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Bloody Sunday (1920)

Bloody Sunday (Domhnach na Fola) was a day of violence in Dublin on 21 November 1920, during the Irish War of Independence. More than 30 people were killed or fatally wounded.

The day began with an Irish Republican Army (IRA) operation, organised by Michael Collins, to assassinate the "Cairo Gang" – a group of undercover British intelligence agents working and living in Dublin. IRA operatives went to a number of addresses and killed or fatally wounded 15 men. Most were British Army officers, one was a Royal Irish Constabulary (RIC) sergeant, and two were Auxiliaries responding to the attacks. At least two civilians were killed, but the status of some of those killed is unclear. Five others were wounded. The assassinations sparked panic among the British authorities, and many British agents fled to Dublin Castle for safety.

Later that afternoon, British forces raided a Gaelic football match in Croke Park. British RIC members called "Black and Tans", Auxiliaries, and British soldiers,  were sent to carry out a cordon and search operation. Without warning, the police opened fire on the spectators and players, killing or fatally wounding 14 civilians and wounding at least sixty others. Three of those killed were children. Some of the police claimed they were fired at, and this was accepted by the British authorities. All other witnesses said the shooting was unprovoked, and a military inquiry concluded it was indiscriminate and excessive. The massacre further turned Irish public opinion against the British authorities.

That evening, two Irish republicans (Dick McKee and Peadar Clancy) who had helped plan the earlier assassinations, along with a civilian (Conor Clune) who happened to be caught with the others, were beaten and shot dead in Dublin Castle by their British captors, who said that they were killed during an escape attempt. Two other IRA members were later convicted and hanged in March 1921 for their part in the assassinations.

Overall, the IRA assassination operation severely damaged British intelligence, while the later reprisals increased support for the IRA at home and abroad.

Background
Bloody Sunday was one of the most significant events to take place during the Irish War of Independence, which followed the declaration of an Irish Republic and the founding of its parliament, Dáil Éireann. The Irish Republican Army (IRA) waged a guerrilla war against British forces: the Royal Irish Constabulary and the British Army, who were tasked with suppressing it.

In response to increasing IRA activity, the British government began bolstering the RIC with recruits from Britain, who became known as "Black and Tans" due to their mixture of dark green RIC police and khaki military uniforms. It also formed an RIC paramilitary unit, the Auxiliary Division (or "Auxiliaries"). Both groups soon became notorious for their brutal treatment of the civilian population. In Dublin, the conflict largely took the form of assassinations and reprisals on both sides.

The events on the morning of 21 November were an effort by the IRA in Dublin, under Michael Collins and Richard Mulcahy, to destroy the British intelligence network in the city.

Collins's plan
Michael Collins was the IRA's Chief of Intelligence and Finance Minister of the Irish Republic. Since 1919 he had operated a clandestine "Squad" of IRA members in Dublin (a.k.a. "The Twelve Apostles"), who were tasked with assassinating prominent RIC officers and British agents, including suspected informers.

By late 1920, British Intelligence in Dublin had established an extensive network of spies and informers around the city. This included eighteen British Intelligence agents known as the "Cairo Gang"; a nickname which came from their patronage of the Cairo Café on Grafton Street and from their service in British military intelligence in Egypt and Palestine during the First World War. Mulcahy, the IRA Chief of Staff, described it as, "a very dangerous and cleverly placed spy organisation".

In early November 1920, some prominent IRA members in Dublin were almost captured. On 10 November, Mulcahy narrowly evaded capture in a raid, but British forces seized documents which included names and addresses of 200 IRA members. Shortly after, Collins ordered the assassination of British agents in the city, judging that if this was not done, the IRA's organisation in the capital would be in grave danger. The IRA also believed that British forces were implementing a coordinated policy of assassination of leading republicans.

Dick McKee was put in charge of planning the operation. The addresses of the British agents were discovered from a variety of sources, including sympathetic maids and other servants, careless talk from some of the British, and an IRA informant in the RIC (Sergeant Mannix) based in Donnybrook barracks. Collins's plan had initially been to kill more than 50 suspected British intelligence officers and informers, but the list was reduced to thirty-five on the insistence of Cathal Brugha, the Minister for Defence for the Irish Republic, reportedly on the grounds that there was insufficient evidence against some of those named. The number was eventually lowered again, to 20.

On the night of 20 November, the leaders of the assassination teams, which included the Squad and members of the IRA's Dublin Brigade, were briefed on their targets, which included twenty agents at eight different locations in Dublin. Two of those who attended the meeting—Dick McKee and Peadar Clancy—were arrested in a raid a few hours later, and Collins narrowly evaded capture in another raid.

Morning: IRA assassinations
Early on the morning of 21 November, the IRA teams mounted the operation. Most of the assassinations occurred within a small middle-class area of south inner-city Dublin, except for two shootings at the Gresham Hotel on Sackville Street (now O'Connell Street). At 28 Upper Pembroke Street, six British Army officers were shot. Two Intelligence officers were killed outright; (Lieutenant-Colonel Hugh Montgomery), a staff officer, died of his wounds on 10 December; the rest survived. Another successful attack took place at 38 Upper Mount Street, where another two Intelligence officers were killed. A British Army dispatch rider stumbled upon the operation on Upper Mount Street and was held at gunpoint by the IRA. As they left the scene the IRA exchanged fire with a British major who had spotted them from a nearby house.

At 22 Lower Mount Street, one Intelligence officer was killed, but another escaped. A third, surnamed "Peel", managed to keep the assassins from entering his room. The building was then surrounded by members of the Auxiliary Division, who happened to be passing by, and the IRA team was forced to shoot its way out. One IRA volunteer, Frank Teeling, was shot and captured as the team fled the building. In the meantime, two of the Auxiliaries had been sent on foot to bring reinforcements from the nearby barracks. They were captured by an IRA team on Mount Street Bridge and marched to a house on Northumberland Road where they were interrogated and shot dead. They were the first Auxiliaries to be killed on active duty.

At 117 Morehampton Road, the IRA killed a sixth Intelligence officer, but also shot his civilian landlord, presumably by mistake. While at the Gresham Hotel, they killed another two men who were apparently civilians, both of them former British officers who served in the First World War. The IRA team had ordered a hotel porter to take them to specific rooms. In one of them (MacCormack) was apparently not the intended target. The status of the other (Wilde) is unclear. According to one of the IRA team, James Cahill, Wilde told the IRA he was an Intelligence officer when asked his name, apparently mistaking them for a police raiding party.

One of the IRA volunteers who took part in these attacks, Seán Lemass, later became a prominent Irish politician and served as Taoiseach. On the morning of Bloody Sunday, he took part in the assassination of a British court-martial officer at 119 Lower Baggot Street. Another court-martial officer was killed at another address on the same street. At 28 Earlsfort Terrace, an RIC sergeant named Fitzgerald was killed, but apparently the target was a British lieutenant-colonel Fitzpatrick.

There has been confusion and disagreement about the status of the IRA's victims on the morning of Bloody Sunday. At the time, the British government said that the men killed were ordinary British officers or (in some cases) innocent civilians. The IRA were convinced that most of their targets had been British Intelligence agents. In a 1972 article, historian Tom Bowden concluded that "the officers shot by the IRA were, in the main, involved in some aspect of British intelligence". Charles Townshend disagreed: in a response published in 1979, he criticised Bowden's work, while presenting evidence from the Collins Papers to show that "several of the 21st November cases were just regular officers". The most recent research, by Irish military historian Jane Leonard, concluded that, of the nine British officers who were killed, six had been undertaking intelligence work; two had been court-martial officers; another was a senior staff officer serving with Irish Command, but unconnected with military intelligence. One of the two men shot at the Gresham Hotel (Wilde) was probably on secret service, but the other was an innocent civilian, killed because the assassins went to the wrong room.

In all, 14 men were killed outright, and another was mortally wounded, while five others were wounded but survived. Only one Squad member was captured, Frank Teeling, but he managed to escape from jail soon after. Another IRA volunteer was slightly wounded in the hand. IRA volunteer and future Irish politician, Todd Andrews, said later that "the fact is that the majority of the IRA raids were abortive. The men sought were not in their digs or in several cases, the men looking for them bungled their jobs".

Collins justified the killings in this way: "My one intention was the destruction of the undesirables who continued to make miserable the lives of ordinary decent citizens. I have proof enough to assure myself of the atrocities which this gang of spies and informers have committed. If I had a second motive it was no more than a feeling such as I would have for a dangerous reptile. By their destruction the very air is made sweeter. For myself, my conscience is clear. There is no crime in detecting in wartime the spy and the informer. They have destroyed without trial. I have paid them back in their own coin."

List of those killed
 * Lieutenant Peter Ames (British Army Intelligence Officer) – Upper Mount Street
 * Lieutenant Henry Angliss (cover name 'Patrick McMahon', British Army Intelligence Officer) – Lower Mount Street
 * Lieutenant Geoffrey Baggallay (British Army Court-Martial Officer) – 119 Lower Baggot St
 * Lieutenant George Bennett (British Army Intelligence Officer) – Upper Mount Street
 * Major Charles Dowling (British Army Intelligence Officer) – Pembroke Street
 * Sergeant John Fitzgerald (RIC officer) – Earlsfort Terrace
 * Auxiliary Frank Garniss (RIC Auxiliary, former British Army lieutenant) – Northumberland Road
 * Lieutenant Donald MacLean (British Army Intelligence Officer) – Morehampton Road
 * Patrick MacCormack (civilian, former British Army RAVC captain) – Gresham Hotel
 * Lieutenant-Colonel Hugh Montgomery (British Army Staff Officer) – Pembroke Street (died on 10 December)
 * Auxiliary Cecil Morris (RIC Auxiliary, former British Army captain) – Northumberland Road
 * Captain William Newberry (British Army Court-Martial Officer) – 92 Lower Baggot Street
 * Captain Leonard Price (British Army Intelligence Officer) – Pembroke Street
 * Thomas Smith (civilian, landlord of MacLean) – Morehampton Road
 * Leonard Wilde (civilian and possible Intelligence agent, former British Army lieutenant) – Gresham Hotel

Afternoon: Croke Park massacre
The Dublin Gaelic football team was scheduled to play the Tipperary team later the same day in Croke Park, the Gaelic Athletic Association's major football ground. Money raised from ticket sales would go to the Republican Prisoners' Dependents' Fund. Despite the general unease in Dublin as news broke of the assassinations, a war-weary populace continued with life. At least 5,000 spectators went to Croke Park for the match, which began thirty minutes late, at 3:15 p.m.

Meanwhile, unbeknownst to the crowd, British forces were approaching and preparing to raid the match. A convoy of troops in trucks and three armoured cars drove in from the north and halted along Clonliffe Road. A convoy of RIC police drove in from the southwest, along Russell Street–Jones's Road. It comprised twelve trucks of Black and Tans in front and six trucks of Auxiliaries behind. Several plain-clothes Auxiliaries also rode in front with the Black and Tans. Their orders were to surround Croke Park, guard the exits, and search every man. The authorities later stated that their intention was to announce by megaphone that all males leaving the grounds would be searched and that anyone leaving by other means would be shot. However, for some reason, shots were fired by police as soon as they reached the southwest gate at the Royal Canal end of Croke Park, at 3:25 pm.

Some of the police later claimed they were fired on first as they arrived outside Croke Park, allegedly by IRA sentries; but other police at the front of the convoy did not corroborate this, and there is no convincing evidence for it. Civilian witnesses all agreed that the RIC opened fire without provocation as they ran into the grounds. Two Dublin Metropolitan Police (DMP) constables on duty near the Canal gate did not report the RIC being fired on. Another DMP constable testified that an RIC group also arrived at the Main gate and began firing in the air. Correspondents for the Manchester Guardian and Britain's Daily News interviewed witnesses, and concluded that the "IRA sentries" were actually ticket-sellers: "It is the custom at this football ground for tickets to be sold outside the gates by recognised ticket-sellers, who would probably present the appearance of pickets, and would naturally run inside at the approach of a dozen military lorries. No man exposes himself needlessly in Ireland when a military lorry passes by." The police in the convoy's leading trucks appear to have jumped out, run down the passage to the Canal end gate, forced their way through the turnstiles, and started firing rapidly with rifles and revolvers. Ireland's Freeman's Journal reported that "The spectators were startled by a volley of shots fired from inside the turnstile entrances. Armed and uniformed men were seen entering the field, and immediately after the firing broke out scenes of the wildest confusion took place. The spectators made a rush for the far side of Croke Park and shots were fired over their heads and into the crowd."

The police kept shooting for about ninety seconds. Their commander, Major Mills, later admitted that his men were "excited and out of hand". Some police fired into the fleeing crowd from the pitch, while others, outside the grounds, opened fire from the Canal Bridge at spectators who climbed over the Canal Wall trying to escape. At the other side of the Park, soldiers on Clonliffe Road were startled first by the sound of the fusillade, then by the sight of panicked people fleeing the grounds. As the spectators streamed out, an armoured car on St James Avenue fired its machine guns over the heads of the crowd, trying to halt them.

By the time Major Mills got his men back under control, the police had fired 114 rounds of rifle ammunition, while fifty rounds were fired from the armoured car outside the Park. Seven people had been shot to death, and five more had been shot and wounded so badly that they later died; another two people had died in the crowd crush. The dead included Jane Boyle, the only woman killed, who had gone to the match with her fiancé and was due to be married five days later. Two boys aged ten and eleven were shot dead. Two football players, Michael Hogan and Jim Egan, had been shot; Egan survived but Hogan was killed, the only player fatality. There were dozens of other wounded and injured. The police raiding party suffered no casualties.

Once the firing stopped, the security forces searched the remaining men in the crowd before letting them go. The military raiding party recovered one revolver: a local householder testified that a fleeing spectator had thrown it away in his garden. The British authorities stated that 30–40 discarded revolvers were found in the grounds. However, Major Mills stated that no weapons were found on the spectators or in the grounds.

The actions of the police were officially unauthorised and were greeted with horror by the British authorities at Dublin Castle. In an effort to cover up the nature of the behaviour by British forces, a press release was issued which claimed:"A number of men came to Dublin on Saturday under the guise of asking to attend a football match between Tipperary and Dublin. But their real intention was to take part in the series of murderous outrages which took place in Dublin that morning. Learning on Saturday that a number of these gunmen were present in Croke Park, the Crown forces went to raid the field. It was the original intention that an officer would go to the centre of the field and speaking from a megaphone, invite the assassins to come forward. But on their approach, armed pickets gave warning. Shots were fired to warn the wanted men, who caused a stampede and escaped in the confusion."

The Times, which during the war was a pro-Unionist publication, ridiculed Dublin Castle's version of events, as did a British Labour Party delegation visiting Ireland at the time. British Brigadier Frank Percy Crozier, overall commander of the Auxiliary Division, later resigned over what he believed was the official condoning of the unjustified actions of the Auxiliaries in Croke Park. One of his officers told him that "Black and Tans fired into the crowd without any provocation whatsoever". Major Mills stated: "I did not see any need for any firing at all".

List of the Croke Park victims
 * Jane Boyle (26), Dublin
 * James Burke (44), Dublin
 * Daniel Carroll (31), Tipperary (died 23 November)
 * Michael Feery (40), Dublin
 * Michael 'Mick' Hogan (24), Tipperary
 * Tom Hogan (19), Limerick (died 26 November)
 * James Matthews (38), Dublin
 * Patrick O'Dowd (57), Dublin
 * Jerome O'Leary (10), Dublin
 * William Robinson (11), Dublin (died 22 November)
 * Tom Ryan (27), Wexford
 * John William Scott (14), Dublin
 * James Teehan (26), Tipperary
 * Joe Traynor (21), Dublin

Evening: Dublin Castle killings
Later that night, two high-ranking IRA officers, Dick McKee and Peadar Clancy, together with another man, Conor Clune, were killed while being held and interrogated in Dublin Castle. McKee and Clancy had been involved in planning the assassinations of the British agents, and had been captured in a raid hours before they took place. Clune, a member of the Gaelic League, had joined the Irish Volunteers shortly after it was founded, but it is unclear if he was ever active. He had been arrested in another raid on a hotel that IRA members had just left.

Their captors said that, because there was no room in the cells, the prisoners were placed in a guardroom containing arms, and were killed while trying to escape. They allegedly threw grenades, which did not detonate, then fired at the guards with a rifle, but missed. They were shot by Auxiliaries. Medical examination found broken bones and abrasions consistent with prolonged assaults, and bullet wounds to the head and body. Their faces were covered in cuts and bruises, and McKee had an apparent bayonet wound in his side. Michael Lynch, an IRA Brigade Commander stated that McKee suffered severe beatings prior to being shot to death - "I saw Dick McKee's body afterwards, and it was almost unrecognizable. He had evidently been tortured before being shot...They must have beaten Dick to a pulp. When they threatened him with death, according to reports, Dick's last words were, Go on, and do your worst!"

However, Clune's employer, Edward MacLysaght, who viewed the corpses at King George V Hospital, stated that the claim "that their faces were so battered about as to be unrecognisable and horrible to look at is quite untrue. I remember those pale dead faces as if I had looked at them yesterday, they were not disfigured". An army doctor who examined the bodies found signs of discolouring on the skin, but stated this could have been the result of how the bodies were left lying. He found numerous bullet wounds as did a private doctor hired by Edward MacLysaght but no signs of any other injuries such as bayoneting. IRA mole David Neligan was also adamant about this fact. Head of British Intelligence Brigadier General Ormonde Winter carried out his own private investigation, interviewing the guards and inspecting the scene, pronouncing himself happy with their account, noting "One of the rebels was lying on his back near the fireplace, with a grenade in his right hand, and the other two were close by. And on a form in front of the fireplace I found a deep cut that had been made by the spade when it had been used to attack the auxiliary. I extracted the bullet from the door and at once reported to Sir John Anderson who, somewhat dubious of the accuracy of my information, accompanied me to the guardroom. He listened to the statements of the auxiliaries and I was able to show him ocular and tangible proof of them".

Aftermath
Together, the attacks on the British agents, and the British massacre of civilians, damaged British authority and increased support for the IRA. The killings of the match-goers (including a woman, two children, and a player) made international headlines, damaging British credibility and further turning the Irish public against the British authorities. Some contemporary newspapers, including the nationalist Freeman's Journal, likened the shootings in Croke Park to the Amritsar massacre, which had taken place in India in April 1919. Later commentators also did likewise.

When Joseph Devlin, an Irish Parliamentary Party Member of Parliament (MP), tried to bring up the Croke Park massacre at Westminster, he was shouted down and physically assaulted by his fellow MPs; the sitting had to be suspended. There was no public inquiry into the Croke Park massacre. Instead, two British military courts of inquiry into the massacre were held behind closed doors, at the Mater Hospital and at Jervis Street Hospital. More than thirty people gave evidence, most of them anonymous Black and Tans, Auxiliaries and British soldiers. One inquiry concluded that unknown civilians probably fired first, either as a warning of the raid or to create panic. But it also concluded: "the fire of the RIC was carried out without orders and exceeded the demands of the situation". Major General Boyd, the British officer commanding Dublin District, added that in his opinion, the firing on the crowd "was indiscriminate, and unjustifiable, with the exception of any shooting which took place inside the enclosure". The findings of these inquiries were suppressed by the British Government, and only came to light in 2000.

The IRA assassinations sparked panic among the British military authorities, and numerous British agents fled to Dublin Castle for safety. In Britain and in the short term, the killings of the British Army officers received more attention. The bodies of nine of the Army officers assassinated were brought in procession through the streets of London en route to their funerals. The fate of the British agents was seen in Dublin as an IRA intelligence victory, but British Prime Minister David Lloyd George commented dismissively that his men "got what they deserved, beaten by counter-jumpers". Winston Churchill added that the agents were "careless fellows ... who ought to have taken precautions".

One IRA member was captured during the assassinations that morning, and several others were arrested in the following days. Frank Teeling (who had been captured) was tried for the killing of Lieutenant Angliss along with William Conway, Edward Potter and Daniel Healy. Teeling, Conway and Potter were convicted and sentenced to death. Teeling escaped from prison and the other two were later reprieved. Thomas Whelan, James Boyce, James McNamara and Michael Tobin were arrested for the killing of Lieutenant Baggallay. Only Whelan was convicted; he was executed on 14 March 1921. Patrick Moran was sentenced to death for Gresham Hotel killings and also executed on 14 March.

The Gaelic Athletic Association (GAA) named one of the stands in Croke Park as the Hogan Stand in memory of Michael Hogan, the football player killed in the incident.

James "Shanker" Ryan, who had informed on Clancy and McKee, was shot and killed by the IRA in February 1921.

IRA assassinations continued in Dublin for the remainder of the war, in addition to more large-scale urban guerrilla actions by the Dublin Brigade. By the spring of 1921, the British had rebuilt their intelligence organisation in Dublin, and the IRA were planning another assassination attempt on British agents in the summer of that year. However, many of these plans were called off because of the truce that ended the war in July 1921.

22 Lower Mount Street trial
The trial for the Lower Mount Street killings was held as a Field General Court-martial at City Hall in Dublin, on Tuesday 25 January 1921. The four accused men were William Conway, Daniel Healy, Edward Potter, and Frank Teeling. Daniel Healy was excused by the prosecution and given a separate trial after a petition by counsel that the evidence against the other prisoners would embarrass his client. The trial of the three other prisoners proceeded. They were charged with the murder of Lieutenant H. Angliss of the Royal Inniskilling Fusiliers, otherwise known as Mr McMahon of 22 Lower Mount Street. The whole of Ireland was enthralled by the trial, with most Irish newspapers and international newspapers reporting it.

The prosecution opened with an account of the start of the incident: "At about 9 o'clock two men came to the front door, one of whom asked for Mr. McMahon and the second for Mr. B. The men dashed upstairs and one of them, the prisoner Conway, went to Mr. B.'s room. The other man went to Mr. McMahon's door. The men knocked at the doors, and more men with revolvers came into the house and ran up the stairs. The servant called out to warn Mr. McMahon, and she saw Teeling enter the room followed by others. He called out "Hands up," and Mr. McMahon and a companion occupying the same room were covered with revolvers by five men, two of whom would be identified as Teeling and Potter. Mr B. barricaded his door, and Conway fired shots through it ... Mr. McMahon's companion got under the bed while Mr. McMahon was being shot, and the men left. It was then found that Mr. McMahon was dead, having been wounded in four parts of the body."

Mr "C" was brought forward as a witness on 28 January and was identified as the man sleeping in the same bed who escaped by jumping out the window when the attackers came into the room. Mr "C" was identified as Lieutenant John Joseph Connolly.

Mr "B" was another trial witness, and he was later identified as Lt Charles R. Peel. His description of the incident during the trial was reported in Hansard: "The maid opened the door, twenty men rushed in [the IRA say 11 men], and demanded to know the bedrooms of Mr. Mahon [sic] ... and Mr. Peel. Mr. Mahon [sic]'s room was pointed out. They entered, and five shots were fired immediately at a few inches range. Mr. Mahon [sic] was killed. At the same time others attempted to enter Mr. Peel's room. The door was locked. Seventeen shots were fired through the panels. Mr. Peel escaped uninjured. Meanwhile another servant, hearing the shots, shouted from an upper window to a party of officers of the Auxiliary Division who had left Beggars Bush Barracks to catch an early train southward for duty."

The Irish Independent (26 January 1921) reported that "Cross examined by a witness at the house, Mr. Bewley said 'he did not see Teeling in the house.' He saw him being carried out from the yard. One witness stated that he took the first witness Nellie Stapleton to Wellington Barracks on 17 December. She was put into a corridor in which there 3 or 4 windows covered with brown paper. Eight prisoners were brought out and the lady pointed out Potter. The man who shared McMahons room, Mr. 'C' also identified Potter."

Frank Teeling managed to escape from Kilmainham in a daring raid organised by Collins.

The Irish Times reported that on 6 March 1921, the death sentences of Conway and Potter were commuted by the Viceroy of Ireland to penal servitude. Daniel Healy was eventually acquitted.

title: Bloody Sunday (1920)


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Stratigraphy

Stratigraphy is a branch of geology concerned with the study of rock layers (strata) and layering (stratification). It is primarily used in the study of sedimentary and layered volcanic rocks. Stratigraphy has three related subfields: lithostratigraphy (lithologic stratigraphy), biostratigraphy (biologic stratigraphy), and chronostratigraphy (stratigraphy by age).

Historical development
Catholic priest Nicholas Steno established the theoretical basis for stratigraphy when he introduced the law of superposition, the principle of original horizontality and the principle of lateral continuity in a 1669 work on the fossilization of organic remains in layers of sediment.

The first practical large-scale application of stratigraphy was by William Smith in the 1790s and early 19th century. Known as the "Father of English geology", Smith recognized the significance of strata or rock layering and the importance of fossil markers for correlating strata; he created the first geologic map of England. Other influential applications of stratigraphy in the early 19th century were by Georges Cuvier and Alexandre Brongniart, who studied the geology of the region around Paris.

Lithostratigraphy

Variation in rock units, most obviously displayed as visible layering, is due to physical contrasts in rock type (lithology). This variation can occur vertically as layering (bedding), or laterally, and reflects changes in environments of deposition (known as facies change). These variations provide a lithostratigraphy or lithologic stratigraphy of the rock unit. Key concepts in stratigraphy involve understanding how certain geometric relationships between rock layers arise and what these geometries imply about their original depositional environment. The basic concept in stratigraphy, called the law of superposition, states: in an undeformed stratigraphic sequence, the oldest strata occur at the base of the sequence.

Chemostratigraphy studies the changes in the relative proportions of trace elements and isotopes within and between lithologic units. Carbon and oxygen isotope ratios vary with time, and researchers can use those to map subtle changes that occurred in the paleoenvironment. This has led to the specialized field of isotopic stratigraphy.

Cyclostratigraphy documents the often cyclic changes in the relative proportions of minerals (particularly carbonates), grain size, thickness of sediment layers (varves) and fossil diversity with time, related to seasonal or longer term changes in palaeoclimates.

Biostratigraphy
Biostratigraphy or paleontologic stratigraphy is based on fossil evidence in the rock layers. Strata from widespread locations containing the same fossil fauna and flora are said to be correlatable in time. Biologic stratigraphy was based on William Smith's principle of faunal succession, which predated, and was one of the first and most powerful lines of evidence for, biological evolution. It provides strong evidence for the formation (speciation) and extinction of species. The geologic time scale was developed during the 19th century, based on the evidence of biologic stratigraphy and faunal succession. This timescale remained a relative scale until the development of radiometric dating, which was based on an absolute time framework, leading to the development of chronostratigraphy.

One important development is the Vail curve, which attempts to define a global historical sea-level curve according to inferences from worldwide stratigraphic patterns. Stratigraphy is also commonly used to delineate the nature and extent of hydrocarbon-bearing reservoir rocks, seals, and traps of petroleum geology.

Chronostratigraphy
Chronostratigraphy is the branch of stratigraphy that places an absolute age, rather than a relative age on rock strata. The branch is concerned with deriving geochronological data for rock units, both directly and inferentially, so that a sequence of time-relative events that created the rocks formation can be derived. The ultimate aim of chronostratigraphy is to place dates on the sequence of deposition of all rocks within a geological region, and then to every region, and by extension to provide an entire geologic record of the Earth.

A gap or missing strata in the geological record of an area is called a stratigraphic hiatus. This may be the result of a halt in the deposition of sediment. Alternatively, the gap may be due to removal by erosion, in which case it may be called a stratigraphic vacuity. It is called a hiatus because deposition was on hold for a period of time. A physical gap may represent both a period of non-deposition and a period of erosion. A geologic fault may cause the appearance of a hiatus.

Magnetostratigraphy

Magnetostratigraphy is a chronostratigraphic technique used to date sedimentary and volcanic sequences. The method works by collecting oriented samples at measured intervals throughout a section. The samples are analyzed to determine their detrital remanent magnetism (DRM), that is, the polarity of Earth's magnetic field at the time a stratum was deposited. For sedimentary rocks this is possible because, as they fall through the water column, very fine-grained magnetic minerals (< 17 μm) behave like tiny compasses, orienting themselves with Earth's magnetic field. Upon burial, that orientation is preserved. For volcanic rocks, magnetic minerals, which form in the melt, orient themselves with the ambient magnetic field, and are fixed in place upon crystallization of the lava.

Oriented paleomagnetic core samples are collected in the field; mudstones, siltstones, and very fine-grained sandstones are the preferred lithologies because the magnetic grains are finer and more likely to orient with the ambient field during deposition. If the ancient magnetic field were oriented similar to today's field (North Magnetic Pole near the North Rotational Pole), the strata would retain a normal polarity. If the data indicate that the North Magnetic Pole were near the South Rotational Pole, the strata would exhibit reversed polarity.

Results of the individual samples are analyzed by removing the natural remanent magnetization (NRM) to reveal the DRM. Following statistical analysis, the results are used to generate a local magnetostratigraphic column that can then be compared against the Global Magnetic Polarity Time Scale.

This technique is used to date sequences that generally lack fossils or interbedded igneous rocks. The continuous nature of the sampling means that it is also a powerful technique for the estimation of sediment-accumulation rates.

license: Creative Commons - Attribution Share-Alike - https://creativecommons.org/licenses/by-sa/4.0/

title: Stratigraphy


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IASC

IASC may refer to:
 * The UK's Independent Anti-Slavery Commissioner
 * International Accounting Standards Committee
 * International Arctic Science Committee
 * International Association for Statistical Computing
 * International Association for the Study of the Commons
 * International Association of Skateboard Companies
 * the Inter-Agency Standing Committee of the United Nations for coordination of humanitarian assistance
 * International Astronomical Search Collaboration

title: IASC


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Fault (geology)

In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tectonic forces, with the largest forming the boundaries between the plates, such as the megathrust faults of subduction zones or transform faults. Energy release associated with rapid movement on active faults is the cause of most earthquakes. Faults may also displace slowly, by aseismic creep.

A fault plane is the plane that represents the fracture surface of a fault. A fault trace or fault line is a place where the fault can be seen or mapped on the surface. A fault trace is also the line commonly plotted on geologic maps to represent a fault.

A fault zone is a cluster of parallel faults. However, the term is also used for the zone of crushed rock along a single fault. Prolonged motion along closely spaced faults can blur the distinction, as the rock between the faults is converted to fault-bound lenses of rock and then progressively crushed.

Mechanisms of faulting
Due to friction and the rigidity of the constituent rocks, the two sides of a fault cannot always glide or flow past each other easily, and so occasionally all movement stops. The regions of higher friction along a fault plane, where it becomes locked, are called asperities. Stress builds up when a fault is locked, and when it reaches a level that exceeds the strength threshold, the fault ruptures and the accumulated strain energy is released in part as seismic waves, forming an earthquake.

Strain occurs accumulatively or instantaneously, depending on the liquid state of the rock; the ductile lower crust and mantle accumulate deformation gradually via shearing, whereas the brittle upper crust reacts by fracture – instantaneous stress release – resulting in motion along the fault. A fault in ductile rocks can also release instantaneously when the strain rate is too great.

Slip, heave, throw
Slip is defined as the relative movement of geological features present on either side of a fault plane. A fault's sense of slip is defined as the relative motion of the rock on each side of the fault concerning the other side. In measuring the horizontal or vertical separation, the throw of the fault is the vertical component of the separation and the heave of the fault is the horizontal component, as in "Throw up and heave out". The vector of slip can be qualitatively assessed by studying any drag folding of strata, which may be visible on either side of the fault. Drag folding is a zone of folding close to a fault that likely arises from frictional resistance to movement on the fault. The direction and magnitude of heave and throw can be measured only by finding common intersection points on either side of the fault (called a piercing point). In practice, it is usually only possible to find the slip direction of faults, and an approximation of the heave and throw vector.

Hanging wall and footwall
The two sides of a non-vertical fault are known as the hanging wall and footwall. The hanging wall occurs above the fault plane and the footwall occurs below it. This terminology comes from mining: when working a tabular ore body, the miner stood with the footwall under his feet and with the hanging wall above him. These terms are important for distinguishing different dip-slip fault types: reverse faults and normal faults. In a reverse fault, the hanging wall displaces upward, while in a normal fault the hanging wall displaces downward. Distinguishing between these two fault types is important for determining the stress regime of the fault movement.

Fault types
Faults are mainly classified in terms of the angle that the fault plane makes with the Earth's surface, known as the dip, and the direction of slip along the fault plane. Based on the direction of slip, faults can be categorized as:
 * strike-slip, where the offset is predominantly horizontal, parallel to the fault trace;
 * dip-slip, offset is predominantly vertical and/or perpendicular to the fault trace; or
 * oblique-slip, combining strike-slip and dip-slip.

Strike-slip faults

In a strike-slip fault (also known as a wrench fault, tear fault or transcurrent fault), the fault surface (plane) is usually near vertical, and the footwall moves laterally either left or right with very little vertical motion. Strike-slip faults with left-lateral motion are also known as sinistral faults and those with right-lateral motion as dextral faults. Each is defined by the direction of movement of the ground as would be seen by an observer on the opposite side of the fault.

A special class of strike-slip fault is the transform fault when it forms a plate boundary. This class is related to an offset in a spreading center, such as a mid-ocean ridge, or, less common, within continental lithosphere, such as the Dead Sea Transform in the Middle East or the Alpine Fault in New Zealand. Transform faults are also referred to as "conservative" plate boundaries since the lithosphere is neither created nor destroyed.

Dip-slip faults

Dip-slip faults can be either normal ("extensional") or reverse. In a normal fault, the hanging wall moves downward, relative to the footwall. A downthrown block between two normal faults dipping towards each other is a graben. An upthrown block between two normal faults dipping away from each other is a horst. The dip of most normal faults is at least 60 degrees but some normal faults dip at less than 45 degrees. Low-angle normal faults with regional tectonic significance may be designated detachment faults. A reverse fault is the opposite of a normal fault—the hanging wall moves up relative to the footwall. Reverse faults indicate compressive shortening of the crust. The terminology of "normal" and "reverse" comes from coal mining in England, where normal faults are the most common.

A thrust fault has the same sense of motion as a reverse fault, but with the dip of the fault plane at less than 45°. Thrust faults typically form ramps, flats and fault-bend (hanging wall and footwall) folds.

A section of a hanging wall or foot wall where a thrust fault formed along a relatively weak bedding plane is known as a flat and a section where the thrust fault cut upward through the stratigraphic sequence is known as a ramp. Typically, thrust faults move within formations by forming flats and climbing up sections with ramps. This results in the hanging wall flat (or a portion thereof) lying atop the foot wall ramp as shown in the fault-bend fold diagram.

Fault-bend folds are formed by the movement of the hanging wall over a non-planar fault surface and are found associated with both extensional and thrust faults.

Faults may be reactivated at a later time with the movement in the opposite direction to the original movement (fault inversion). A normal fault may therefore become a reverse fault and vice versa.

Thrust faults form nappes and klippen in the large thrust belts. Subduction zones are a special class of thrusts that form the largest faults on Earth and give rise to the largest earthquakes.

Oblique-slip faults

A fault which has a component of dip-slip and a component of strike-slip is termed an oblique-slip fault. Nearly all faults have some component of both dip-slip and strike-slip; hence, defining a fault as oblique requires both dip and strike components to be measurable and significant. Some oblique faults occur within transtensional and transpressional regimes, and others occur where the direction of extension or shortening changes during the deformation but the earlier formed faults remain active.

The hade angle is defined as the complement of the dip angle; it is the angle between the fault plane and a vertical plane that strikes parallel to the fault.

Listric fault
Listric faults are similar to normal faults but the fault plane curves, the dip being steeper near the surface, then shallower with increased depth. The dip may flatten into a sub-horizontal décollement, resulting in a horizontal slip on a horizontal plane. The illustration shows the slumping of the hanging wall along a listric fault. Where the hanging wall is absent (such as on a cliff) the footwall may slump in a manner that creates multiple listric faults.

Ring fault
Ring faults, also known as caldera faults, are faults that occur within collapsed volcanic calderas and the sites of bolide strikes, such as the Chesapeake Bay impact crater. Ring faults are the result of a series of overlapping normal faults, forming a circular outline. Fractures created by ring faults may be filled by ring dikes.

Synthetic and antithetic faults
Synthetic and antithetic are terms used to describe minor faults associated with a major fault. Synthetic faults dip in the same direction as the major fault while the antithetic faults dip in the opposite direction. These faults may be accompanied by rollover anticlines (e.g. the Niger Delta Structural Style).

Fault rock

All faults have a measurable thickness, made up of deformed rock characteristic of the level in the crust where the faulting happened, of the rock types affected by the fault and of the presence and nature of any mineralising fluids. Fault rocks are classified by their textures and the implied mechanism of deformation. A fault that passes through different levels of the lithosphere will have many different types of fault rock developed along its surface. Continued dip-slip displacement tends to juxtapose fault rocks characteristic of different crustal levels, with varying degrees of overprinting. This effect is particularly clear in the case of detachment faults and major thrust faults.

The main types of fault rock include:
 * Cataclasite – a fault rock which is cohesive with a poorly developed or absent planar fabric, or which is incohesive, characterised by generally angular clasts and rock fragments in a finer-grained matrix of similar composition.
 * Tectonic or fault breccia – a medium- to coarse-grained cataclasite containing >30% visible fragments.
 * Fault gouge – an incohesive, clay-rich fine- to ultrafine-grained cataclasite, which may possess a planar fabric and containing <30% visible fragments. Rock clasts may be present
 * Clay smear - clay-rich fault gouge formed in sedimentary sequences containing clay-rich layers which are strongly deformed and sheared into the fault gouge.
 * Mylonite – a fault rock which is cohesive and characterized by a well-developed planar fabric resulting from tectonic reduction of grain size, and commonly containing rounded porphyroclasts and rock fragments of similar composition to minerals in the matrix
 * Pseudotachylyte – ultrafine-grained glassy-looking material, usually black and flinty in appearance, occurring as thin planar veins, injection veins or as a matrix to pseudoconglomerates or breccias, which infills dilation fractures in the host rock. Pseudotachylyte likely only forms as the result of seismic slip rates and can act as a fault rate indicator on inactive faults.

Impacts on structures and people
In geotechnical engineering, a fault often forms a discontinuity that may have a large influence on the mechanical behavior (strength, deformation, etc.) of soil and rock masses in, for example, tunnel, foundation, or slope construction.

The level of a fault's activity can be critical for (1) locating buildings, tanks, and pipelines and (2) assessing the seismic shaking and tsunami hazard to infrastructure and people in the vicinity. In California, for example, new building construction has been prohibited directly on or near faults that have moved within the Holocene Epoch (the last 11,700 years) of the Earth's geological history. Also, faults that have shown movement during the Holocene plus Pleistocene Epochs (the last 2.6 million years) may receive consideration, especially for critical structures such as power plants, dams, hospitals, and schools. Geologists assess a fault's age by studying soil features seen in shallow excavations and geomorphology seen in aerial photographs. Subsurface clues include shears and their relationships to carbonate nodules, eroded clay, and iron oxide mineralization, in the case of older soil, and lack of such signs in the case of younger soil. Radiocarbon dating of organic material buried next to or over a fault shear is often critical in distinguishing active from inactive faults. From such relationships, paleoseismologists can estimate the sizes of past earthquakes over the past several hundred years, and develop rough projections of future fault activity.

Faults and ore deposits
Many ore deposits lie on or are associated with faults. This is because the fractured rock associated with fault zones allow for magma ascent or the circulation of mineral-bearing fluids. Intersections of near-vertical faults are often locations of significant ore deposits.

An example of a fault hosting valuable porphyry copper deposits is northern Chile's Domeyko Fault with deposits at Chuquicamata, Collahuasi, El Abra, El Salvador, La Escondida and Potrerillos. Further south in Chile Los Bronces and El Teniente porphyry copper deposit lie each at the intersection of two fault systems.

Faults may not always act as conduits to surface. It has been proposed that deep-seated "misoriented" faults may instead be zones where magmas forming porphyry copper stagnate achieving the right time for—and type of—igneous differentiation. At a given time differentiated magmas would burst violently out of the fault-traps and head to shallower places in the crust where porphyry copper deposits would be formed.

Groundwater
As faults are zones of weakness, they facilitate the interaction of water with the surrounding rock and enhance chemical weathering. The enhanced chemical weathering increases the size of the weathered zone and hence creates more space for groundwater. Fault zones act as aquifers and also assist groundwater transport.

Other reading

title: Fault (geology)


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Manfred, King of Sicily

Manfred (Manfredi di Sicilia; 1232 – 26 February 1266) was the last King of Sicily from the Hohenstaufen dynasty, reigning from 1258 until his death. The natural son of the Holy Roman Emperor Frederick II, Manfred became regent over the kingdom of Sicily on behalf of his nephew Conradin in 1254. As regent he subdued rebellions in the kingdom, until in 1258 he usurped Conradin's rule. After an initial attempt to appease Pope Innocent IV he took up the ongoing conflict between the Hohenstaufens and the papacy through combat and political alliances. He defeated the papal army at Foggia on 2 December 1254. Excommunicated by three successive popes, Manfred was the target of a Crusade (1255–66) called first by Pope Alexander IV and then by Urban IV. Nothing came of Alexander's call, but Urban enlisted the aid of Charles of Anjou in overthrowing Manfred. Manfred was killed during his defeat by Charles at the Battle of Benevento, and Charles assumed kingship of Sicily.

Early life
Manfred was born in Venosa. Frederick II appears to have regarded him as legitimate, and by his will named him as Prince of Taranto. Frederick named Manfred's half-brother Conrad IV king of Germany, Italy and Sicily, but Manfred was regent of Sicily while Conrad was in Germany. Manfred, who initially bore his mother's surname, studied in Paris and Bologna and shared with his father a love of poetry and science.

At Frederick's death in 1250, Manfred, although only about 18 years old, acted loyally and with vigour in the execution of his trust. The Kingdom was in turmoil, mainly due to rebellions spurred by Pope Innocent IV. Manfred was able to subdue numerous rebel cities, with the exception of Naples. Manfred attempted in 1251 to make concessions to Pope Innocent to stave off the prospect of war, but the attempt failed. When Conrad IV, Manfred's legitimate brother, appeared in southern Italy in 1252, his authority was quickly and generally acknowledged. Conrad quickly stripped Manfred of all his fiefs by limiting his authority solely to the principality of Taranto. In October 1253, Naples fell into the hands of Conrad. Conrad made the pope the guardian of Conradin, his infant son, and named the Margrave Berthold of Hohenberg, a powerful German baron, as Conradin's regent.

In May 1254 Conrad died of malaria at the age of twenty-six. Manfred, after refusing to surrender Sicily to Innocent IV, accepted the regency on behalf of Conradin. The pope however, having been named guardian of Conradin, excommunicated Manfred in July 1254. The regent decided to open negotiations with Innocent. As part of a treaty made in September 1254, Manfred submitted, and accepted the title of Papal vicar for southern Italy But Manfred—his suspicions aroused by the demeanour of the papal retinue and annoyed by the occupation of Campania by papal troops—fled to the Saracens at Lucera. Aided by Saracen allies, he defeated the papal army at Foggia on 2 December 1254, and soon established his authority over Sicily and the Sicilian possessions on the mainland. In that year Manfred supported the Ghibelline communes in Tuscany, in particular Siena, to which he provided a corps of German knights that was later instrumental in the defeat of Florence at the Battle of Montaperti. He thus reached the status of patron of the Ghibelline League. Also in that year Innocent died, succeeded by Alexander IV, who immediately excommunicated Manfred. In 1257, however, Manfred crushed the papal army and settled all the rebellions, imposing his firm rule of southern Italy and receiving the title of vicar from Conradin.

Kingship
On 10 August 1258, taking advantage of Conradin's rumoured death, Manfred was crowned King of Sicily at Palermo. The falsehood of this report was soon manifest; but the new king, supported by the popular voice, declined to abdicate and pointed out to Conradin's envoys the necessity for a strong native ruler. The pope, to whom the Saracen alliance was a serious offence, declared Manfred's coronation void. Undeterred by the excommunication Manfred sought to obtain power in central and northern Italy, where the Ghibelline leader Ezzelino III da Romano had disappeared. He named vicars in Tuscany, Spoleto, Marche, Romagna and Lombardy. After Montaperti he was recognized as protector of Tuscany by the citizens of Florence, who did homage to his representative, and he was chosen "Senator of the Romans" by a faction in the city. His power was also augmented by the marriage of his daughter Constance in 1262 to Peter III of Aragon.

Terrified by these proceedings, the new Pope Urban IV excommunicated him. The pope first tried to sell the Kingdom of Sicily to Richard of Cornwall and his son, but in vain. In 1263 he was most successful with Charles I of Anjou, a brother of King Louis IX of France, who accepted the investiture of the kingdom of Sicily at his hands. Hearing of the approach of Charles, Manfred issued a manifesto to the Romans, in which he not only defended his rule over Italy but even claimed the imperial crown.

Charles' army, some 30,000 strong, entered Italy from the Col de Tende in late 1265. He soon reduced numerous Ghibelline strongholds in northern Italy and was crowned in Rome in January 1266, the pope being absent. On 20 January he set southwards and waded the Liri river, invading the Kingdom of Sicily. After some minor clashes, the rival armies met at the Battle of Benevento on 26 February 1266, and Manfred's army was defeated. The king himself, refusing to flee, rushed into the midst of his enemies and was killed. Over his body, which was buried on the battlefield, a huge heap of stones was placed, but afterwards with the consent of the pope the remains were unearthed, cast out of the papal territory, and interred on the bank of the Garigliano River, outside of the boundaries of Naples and the Papal States.

At the Battle of Benevento Charles captured Helena, Manfred's second wife, and imprisoned her. She lived five years later in captivity in the castle of Nocera Inferiore where she died in 1271. Manfred's son-in-law Peter III eventually became King Peter I of Sicily from 1282 after the Sicilian Vespers expelled the French from the island again.

The modern city of Manfredonia was built by King Manfred between 1256–1263, some kilometers north of the ruins of the ancient Sipontum. The Angevines, who had defeated Manfred and stripped him of the Kingdom of Sicily, renamed it Sypontum Novellum ("New Sypontum"), but that name never imposed.

Marriages and children
Manfred was married twice:
 * His first wife was Beatrice, daughter of Amadeus IV, count of Savoy, by whom he had a daughter, Constance, who was married to the heir to the Aragonese throne, the future King Peter III of Aragon, on 13 June 1262.

 * Manfred's second wife was Helena Angelina Doukaina, daughter of Michael II Komnenos Doukas, ruler of the despotate of Epirus, who made this marriage to ally with Manfred after being attacked by him at Thessalonica. Helena and Manfred had four children: Beatrix, Henry [Enrico], Anselm [Azzolino] and Frederick. Helena and all her children were captured by Charles of Anjou after Manfred's death in 1266. Helena died in prison in Nocera in 1271. Her three sons with Manfred – the oldest only four years old at the time – were imprisoned in the Castel del Monte until 1299, when Charles II had them unchained and moved to the Castel dell'Ovo. Their living conditions were exceptionally miserable compared to the norm for noble prisoners. Kept in darkness, in heavy chains and with barely enough food to survive they became "blind and half-mad". The stress of the move proved too much for Azzolino, who died soon after (in 1301). Henry survived another eighteen years, dying aged fifty-four on 31 October 1318, "half-starved, half-mad and probably blind". Beatrix in contrast had been released on the orders of the Aragonese commander Roger of Lauria following a battle off Naples in 1284. She went on to marry Manfred IV, Marquis of Saluzzo. The eldest son, Frederick, escaped his prison and fled to Germany. He spent time in several European courts before dying in Egypt in 1312.

Manfred had at least one illegitimate child, a daughter named Flordelis (d. 27 February 1297), who married Ranieri Della Gherardesca, Count of Donoratico and Bolgheri.

Medieval reception
Contemporaries praised the noble and magnanimous character of Manfred, who was renowned for his physical beauty and intellectual attainments.

In the Divine Comedy, Dante Alighieri meets Manfred outside the gates of Purgatory, where the spirit explains that, although he repented of his sins in articulo mortis, he must atone for his contumacy by waiting 30 years for each year he lived as an excommunicate, before being admitted to Purgatory proper. He then asks Dante to tell Constance about him being in Purgatory. With this statement, Manfred reveals that one's time in Purgatory can lessen if someone still alive can pray on their behalf, anticipating one of the recurring themes in Purgatorio. Family connections, whether by blood or by marriage, are heavily referenced throughout this section of the Divine Comedy. Dante uses these relationships to demonstrate that earthly connections impede souls in Purgatory from reaching Paradise.

Dante's placing of Manfred in Purgatory is surprising given Manfred's excommunication by multiple popes. Manfred's placement in Purgatory is indicative of Dante's dislike of popes' use of excommunication as a political and policy tool. According to Dante, Manfred's excommunication does not make it impossible for him to make it through Purgatory and, eventually, into Paradise. Dante adds to this characterization of Manfred and the Church by describing how the Church ordered Manfred's bones unearthed after his death and thrown into a river outside the kingdom in fear that his gravesite would inspire the development of a cult around it.

Manfred's presence in Purgatorio also holds a more general symbolic value. Robert Hollander argues that Manfred's time in Purgatory should be seen as a symbol of hope, given that Manfred's final statement in Purgatorio, Canto III is that "hope maintains a thread of green" (speranza ha fior del verde) (Purgatorio III.135), which is paraphrased as death not eliminating hope so long as even a bit of hope is there.

Modern reception
Manfred formed the subject of dramas by E.B.S. Raupach, O. Marbach and F.W. Roggee. Three letters written by Manfred were published by J. B. Carusius in Bibliotheca historica regni Siciliae (Palermo, 1732).

Manfred's name was borrowed by the English author Horace Walpole for the main character of his short novel The Castle of Otranto (1764). Montague Summers, in his 1924 edition of this work, showed that some details of Manfred of Sicily's real history inspired the novelist. The name was re-borrowed by Lord Byron for his dramatic poem Manfred (1817).

Inspired by Byron's poem, Manfred was adapted musically by Robert Schumann in 1852, in a composition entitled Manfred: Dramatic Poem with Music in Three Parts, and later by Pyotr Ilyich Tchaikovsky in his Manfred Symphony (1885).

King Manfred (König Manfred), Op. 93 is a grand romantic opera in 5 acts by Carl Reinecke to libretto by Friedrich Roeber. It was composed in 1866 and staged in 1867.

title: Manfred, King of Sicily


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Canadian Armed Forces

The Canadian Armed Forces (CAF; Forces armées canadiennes, FAC) are the unified military forces of Canada, including land, sea, and air commands referred to as the Canadian Army, Royal Canadian Navy, and the Royal Canadian Air Force. The CAF also operates several other commands, including the Canadian Forces Intelligence Command, the Canadian Joint Operations Command, and the Canadian Special Operations Forces Command. Personnel may belong to either the Regular Force or the Reserve Force, which has four sub-components: the Primary Reserve, Supplementary Reserve, Cadet Organizations Administration and Training Service, and the Canadian Rangers. Under the National Defence Act, the Canadian Armed Forces are an entity separate and distinct from the Department of National Defence (the federal government department responsible for the administration and formation of defence policy), which also exists as the civilian support system for the forces.

The commander-in-chief of the Canadian Armed Forces is constitutionally vested in the monarch,. The chief of the Defence Staff is the professional head of the Canadian Armed Forces, who under the direction of the minister of national defence and together with the assistance of the Armed Forces Council, manages the operations of the Canadian Armed Forces.

In 2023, Canada's military expenditure totalled approximately US$27.2 billion, or around 1.3 percent of the country's gross domestic product (GDP) — placing it 16th for military expenditure by country. The Canadian Armed Forces are a professional volunteer force that consists of approximately 68,000 active personnel and 27,000 reserve personnel, with a sub-component of approximately 5,000 Canadian Rangers.

Canada's peacekeeping role during the 20th century has played a major role in its positive global image. Canada has long been reluctant to participate in military operations that are not sanctioned by the United Nations (UN), such as the Vietnam War or the 2003 invasion of Iraq. Since the 21st century, Canadian direct participation in UN peacekeeping efforts greatly declined, with its military participation reallocated to UN-sanctioned operations through the North Atlantic Treaty Organization (NATO).

Origins and establishment
Prior to Confederation in 1867, residents of the colonies in what is now Canada served as regular members of French and British forces and in local militia groups. The latter aided in the defence of their respective territories against attacks by other European powers, Indigenous peoples, and later American forces during the American Revolutionary War and War of 1812, as well as in the Fenian raids, Red River Rebellion, and North-West Rebellion. Consequently, the lineages of some Canadian Army units stretch back to the late 18th century, when militia units were formed to assist in the defence of British North America against invasion by the United States.

The responsibility for military command remained with the British Crown-in-Council, with a commander-in-chief for North America stationed in Halifax until the final withdrawal of British Army and Royal Navy units from the city in 1906. Thereafter, the Royal Canadian Navy was formed, and, with the advent of military aviation, the Royal Canadian Air Force. These forces were organized under the Department of Militia and Defence, and split into the Permanent and Non-Permanent Active Militias—frequently shortened to simply The Militia. By 1923, the department was merged into the Department of National Defence. The first significant overseas deployment of Canadian military forces occurred during the Second Boer War when several units were raised to serve under British command. Similarly, when the United Kingdom entered into conflict with Germany in the First World War, Canadian troops were called to participate in European theatres. Battles that are particularly notable to the Canadian military include the Second Battle of Ypres, the Battle of the Somme, the Battle of Vimy Ridge, the Second Battle of Passchendaele, as well as a series of attacks undertaken by the Canadian Corps during the Hundred Days Offensive.

During this period, a distinctly Canadian army and navy were established, followed by an air force, that, because of the constitutional arrangements at the time, remained effectively under the control of the British government until Canada gained legislative independence from the United Kingdom in 1931, in part due to the distinguished achievement and sacrifice of the Canadian Corps in the First World War. In November 1940, the Canadian militia was formally renamed the Canadian Army. However, in the 1950s, Reserve Army forces were once again referred to in official documentation as "Militia", which, although rare, is still used to refer to part-time members.

Canadian Forces entered the Second World War in September 1939, after the Canadian Crown-in-Council declared war on Nazi Germany. Battles and campaigns during the Second World War that was particularly notable to the Canadian military include the Battle of the Atlantic, the Battle of Britain, the Battle of Hong Kong, the Dieppe Raid, the invasion of Sicily and Italy, Operation Overlord, the Siegfried Line Campaign, Operation Veritable, as well as the strategic bombing of German cities. At the end of the Second World War, Canada possessed the fourth-largest air force and fifth-largest naval surface fleet in the world. Conscription for overseas service was introduced only near the end of the war, and only 2,400 conscripts made it into battle. Originally, Canada was thought to have had the third-largest navy in the world, but with the fall of the Soviet Union, new data based on Japanese and Soviet sources found that to be incorrect.

Since 1947, Canadian military units have participated in more than 200 operations worldwide, and completed 72 international operations. Canadian soldiers, sailors, and aviators came to be considered world-class professionals through conspicuous service during these conflicts and the country's integral participation in NATO during the Korean War, First Gulf War, Kosovo War, and in United Nations Peacekeeping operations, such as the Suez Crisis, Golan Heights, Cyprus, Croatia, Bosnia, Afghanistan, and Libya. Canada maintained an aircraft carrier from 1957 to 1970 during the Cold War, which never saw combat but participated in patrols during the Cuban Missile Crisis.

Since unification
The current iteration of the Canadian Armed Forces dates from 1 February 1968, when the Royal Canadian Navy, Canadian Army, and Royal Canadian Air Force were merged into a unified structure and superseded by elemental commands, known as Air Command, Land Force, and Maritime Command. On 16 August 2011, the names for the three elemental commands were reverted to their historical predecessor, although the unified structure of the Canadian Armed Forces was maintained. Deployment of Land Forces during this period has included NATO efforts in Europe, peacekeeping operations within United Nations-sanctioned conflicts and combat missions. The Canadian Forces deployed in Afghanistan until 2011, under the NATO-led United Nations International Security Assistance Force (ISAF), at the request of the Government of Afghanistan.

The Forces have also deployed domestically to provide aid during emergencies and natural disasters. Over 8,500 military personnel were sent to Manitoba after the 1997 Red River flood to help with evacuation, building dikes, and other flood-fighting efforts. The operation was considered a "public relations bonanza" for the military. The Forces were also deployed after the North American ice storm of 1998, with relief efforts beginning on 8 January, after the provinces of New Brunswick, Ontario, and Quebec requested aid. Over 16,000 troops were deployed, making it the largest deployment of troops ever to serve on Canadian soil in response to a natural disaster, and the largest operational deployment of Canadian military personnel since the Korean War. The Forces were also deployed to British Columbia from 3 August to 16 September 2003, as a part of Operation Peregrine. The operation was conducted after the province was overwhelmed by 800 separate forest fires, and the provincial government requested federal aid. Over 2,200 soldiers were mobilized, and at its height, more than 2,600 military personnel participated in the 45-day operation.

Early 2000s modernization efforts
The Constitution of Canada gives the federal government exclusive responsibility for national defence, and expenditures are thus outlined in the federal budget. For the 2007–2010 fiscal year, the amount allocated for defence spending was CA$6.15 billion which is 1.4 percent of the country's GDP. This regular funding was augmented in 2005 with an additional CA$12.5 billion over five years, as well as a commitment to increasing regular force troop levels by 5,000 persons, and the primary reserve by 4,500 over the same period. It was further augmented in 2010, with another CA$5.3 billion over five years being provided to allow for 13,000 more regular force members, and 10,000 more primary reserve personnel, as well as CA$17.1 billion for the purchase of new trucks for the Canadian Army, transport aircraft and helicopters for the Royal Canadian Air Force, and joint support ships for the Royal Canadian Navy. In 2008, the Government of Canada began efforts, through the "Canada First Defence Strategy", to modernize the Forces, through the purchase of new equipment, improved training and readiness, as well as the establishment of the Canadian Special Operations Regiment. More funds were also put towards recruitment, which had been dwindling throughout the 1980s and 1990s, possibly because the Canadian populace had come to perceive the Forces as peacekeepers rather than as soldiers, as shown in a 2008 survey conducted by the Department of National Defence. The poll found that nearly two-thirds of Canadians agreed with the country's participation in the invasion of Afghanistan, and that the military should be stronger, but also that the purpose of the forces should be different, such as more focused on responding to natural disasters. Then Chief of Defence Staff (CDS) Walter Natynczyk said later that year that, while recruiting has become more successful, the Forces was facing a problem with its rate of loss of existing members, which increased between 2006 and 2008 from 6% to 9.2% annually.

Renewal and re-equipment efforts have resulted in the acquisition of specific equipment (main battle tanks, artillery, unmanned air vehicles and other systems) to support the mission in Afghanistan. It has also encompassed initiatives to renew certain so-called "core capabilities" (such as the air force's medium-range transport aircraft fleet—the C-130 Hercules—and the army's truck and armoured vehicle fleets). In addition, new systems (such as C-17 Globemaster III strategic transport aircraft and CH-47 Chinook heavy-lift helicopters) have also been acquired for the Forces.

Role of women
In the 1950s, the recruitment of women was open to roles in medicine, communication, logistics, and administration. The roles of women in the CAF began to expand in 1971 after the department reviewed the recommendations of the Royal Commission on the Status of Women, at which time it lifted the ceiling of 1,500 women personnel, and gradually expanded employment opportunities into the non-traditional areas—vehicle drivers and mechanics, aircraft mechanics, air-traffic controllers, military police, and firefighters. The department further reviewed personnel policies in 1978 and 1985, after Parliament passed the Canadian Human Rights Act and the Canadian Charter of Rights and Freedoms. As a result of these reviews, the department changed its policies to permit women to serve at sea in replenishment ships and a diving tender, with the army service battalions, in military police platoons and field ambulance units, and most air squadrons.

In 1987, occupations and units with the primary role of preparing for direct involvement in combat on the ground or at sea were still closed to women: infantry, armoured corps, field artillery, air defence artillery, signals, field engineers, and naval operations. On 5 February 1987, the minister of national defence created an office to study the impact of employing men and women in combat units. These trials were called Combat-Related Employment of Women.

All military occupations were open to women in 1989, except submarine service, which opened in 2000. Throughout the 1990s, the introduction of women into the combat arms increased the potential recruiting pool by about 100 percent. Women were fully integrated into all occupations and roles by the government of Jean Chrétien, and by 8 March 2000, even allowed to serve on submarines.

All equipment must be suitable for a mixed-gender force. Combat helmets, rucksacks, combat boots, and flak jackets are designed to ensure women have the same level of protection and comfort as their male colleagues. Women's uniforms are similar in design to men's uniforms, but conform to the female figure, and are functional and practical. Women are also provided with an annual financial entitlement for the purchase of bras.

In 2019, the National Post columnist Christie Blatchford reported, per an anonymous source, that the CAF had been fulfilling employment equity targets for internal job postings by secretly rejecting applications from white males, and by not requiring Indigenous candidates to either write or pass, the Canadian Forces Aptitude Test. However, Brigadier-General Virginia Tattersall (commander of military forces generation, including the Canadian Forces Recruiting Group [CFRG]) said, "There are no occupations that we restrict based on gender", though "diversity is a consideration" and near the end of the recruiting year, "We will look at diversity applicants first."

In March 2021, Lieutenant-Colonel Eleanor Taylor resigned citing sexual misconduct among the top brass. Since then, the CAF has been under pressure over allegations of sexual misconduct. Former justice Louise Arbour, who was tasked to lead a probe into military harassment and sexual misconduct claims in CAF in 2021, issued 48 recommendations to change the culture of the CAF. She said that she saw no basis for the CAF to retain the jurisdiction over sexual offences as it has not improved efficiency, discipline and morale.

Structure
The Crown has long occupied a central position in the Canadian Armed Forces. The National Defence Act states that "the Canadian Forces are the armed forces of Her Majesty raised by Canada, consisting of one service called the Canadian Armed Forces" and the Constitution Act, 1867, vests command-in-chief of the Forces in the country's sovereign, who, since 1904, has authorized his or her viceroy, the governor general, to exercise the duties ascribed to the post of commander-in-chief and, since 1905, hold the associated title. All troop deployment and disposition orders, including declarations of war, fall within the royal prerogative and are issued as orders-in-Council, which must be signed by either the monarch or governor general. Under the Westminster system's parliamentary customs and practices, however, the monarch and viceroy must generally follow the advice of his or her ministers in Cabinet, including the prime minister and minister of national defence, who are accountable to the elected House of Commons. The Canadian Forces' 92,600 personnel are divided into a hierarchy of numerous ranks of officers and non-commissioned members. The governor general appoints, on the advice of the prime minister, the chief of the Defence Staff (CDS) as the highest-ranking commissioned officer in the Armed Forces and its commander. In this role, the CDS heads the Armed Forces Council, which also includes the vice chief of the Defence Staff and the commanders of the Royal Canadian Navy, Canadian Army, Royal Canadian Air Force, Canadian Joint Operations Command, Canadian Special Operations Forces Command, as well as certain other designated personnel. The Armed Forces Council generally operates from National Defence Headquarters (NDHQ) in Ottawa, Ontario. The sovereign and most other members of the Canadian Royal Family also act as colonels-in-chief, honorary air commodores, air commodores-in-chief, admirals, and captains-general of Canadian Forces units, though these positions are ceremonial.

The Canadian Forces operate out of 27 Canadian Forces bases (CFB) across the country, including NDHQ. This number has been gradually reduced since the 1970s with bases either being closed or merged. Both officers and non-commissioned members receive their basic training at the Canadian Forces Leadership and Recruit School in Saint-Jean-sur-Richelieu. Officers will generally either directly enter the Canadian Armed Forces with a degree from a civilian university or receive their commission upon graduation from the Royal Military College of Canada. Specific element and trade training is conducted at a variety of institutions throughout Canada, and to a lesser extent, the world.

As of 2013, the Canadian Forces have 68,000 Regular Force members and 27,000 reservists, bringing the total force to approximately 95,000. These individuals serve on numerous Canadian Forces bases located in all regions of the country and are governed by the Queen's Regulations and Orders and the National Defence Act.

Royal Canadian Navy
The Royal Canadian Navy (RCN), headed by the commander of the Royal Canadian Navy, includes 28 warships and submarines deployed in two fleets: Maritime Forces Pacific (MARPAC) at CFB Esquimalt on the west coast, and Maritime Forces Atlantic (MARLANT) at CFB Halifax on the east coast, as well as one formation: the Naval Reserve Headquarters (NAVRESHQ) at Quebec City, Quebec. The fleet is augmented by various aircraft and supply vessels. The RCN participates in NATO exercises and operations, and ships are deployed all over the world in support of multinational deployments.

Canadian Army
The Canadian Army is headed by the commander of the Canadian Army and is administered through four divisions—the 2nd Canadian Division, the 3rd Canadian Division, the 4th Canadian Division and the 5th Canadian Division—the Canadian Army Doctrine and Training System and the Canadian Army Headquarters.

Currently, the Regular Force component of the Army consists of three field-ready brigade groups: 1 Canadian Mechanized Brigade Group, at CFB Edmonton and CFB Shilo; 2 Canadian Mechanized Brigade Group, at CFB Petawawa and CFB Gagetown; and 5 Canadian Mechanized Brigade Group, at CFB Valcartier and Quebec City. Each contains one regiment of artillery, armour, and combat engineers, three battalions of infantry (all scaled in the British fashion), one battalion for logistics, a squadron for headquarters/signals, and several smaller support organizations. A tactical helicopter squadron and a field ambulance are co-located with each brigade but do not form part of the brigade's command structure.

The 2nd, 3rd and 4th Canadian Divisions each have a Regular Force brigade group, and each division except the 1st has two to three Reserve Force brigades groups. In total, there are ten Reserve Force brigade groups. The 5th Canadian Division and the 2nd Canadian Division each have two Reserve Force brigade groups, while the 4th Canadian Division and the 3rd Canadian Division each have three Reserve Force brigade groups. Major training and support establishments exist at CFB Gagetown, CFB Montreal and CFB Wainwright.

Royal Canadian Air Force
The Royal Canadian Air Force (RCAF) is headed by the commander of the Royal Canadian Air Force. The commander of 1 Canadian Air Division and Canadian NORAD Region, based in Winnipeg, is responsible for the operational command and control of Air Force activities throughout Canada and worldwide. 1 Canadian Air Division operations are carried out through eleven wings located across Canada. The commander of 2 Canadian Air Division is responsible for training and support functions. 2 Canadian Air Division operations are carried out at two wings. 3 Canadian Space Division is responsible for delivering space power effects in support of Canadian Armed Forces operations, including space domain awareness, space-based support of military operations, and defending and protecting military space capabilities. Wings represent the grouping of various squadrons, both operational and support, under a single tactical commander reporting to the operational commander and vary in size from several hundred personnel to several thousand.

Major air bases are located in British Columbia, Alberta, Saskatchewan, Manitoba, Ontario, Quebec, Nova Scotia, and Newfoundland and Labrador, while administrative and command and control facilities are located in Winnipeg and North Bay. A Canadian component of the NATO Airborne Early Warning Force is also based at NATO Air Base Geilenkirchen near Geilenkirchen, Germany.

The RCAF and Joint Task Force (North) (JTFN) also maintain at various points throughout Canada's northern region a chain of forward operating locations, each capable of supporting fighter operations. Elements of CF-18 squadrons periodically deploy to these airports for short training exercises or Arctic sovereignty patrols.

Canadian Joint Operations Command
The Canadian Joint Operations Command is an operational element established in October 2012 with the merger of Canada Command, the Canadian Expeditionary Force Command and the Canadian Operational Support Command. The new command, created as a response to the cost-cutting measures in the 2012 federal budget, combines the resources, roles and responsibilities of the three former commands under a single headquarters.

Canadian Special Operations Forces Command
The Canadian Special Operations Forces Command (CANSOFCOM) is a formation capable of operating independently but primarily focused on generating special operations forces (SOF) elements to support CJOC. The command includes Joint Task Force 2 (JTF2), the Canadian Joint Incident Response Unit (CJIRU) based at CFB Trenton, as well as the Canadian Special Operations Regiment (CSOR) and 427 Special Operations Aviation Squadron (SOAS) based at CFB Petawawa.

Information Management Group
Among other things, the Information Management Group is responsible for the conduct of electronic warfare and the protection of the Armed Forces' communications and computer networks. Within the group, this operational role is fulfilled by the Canadian Forces Information Operations Group, headquartered at CFS Leitrim in Ottawa, which operates the following units: the Canadian Forces Information Operations Group Headquarters (CFIOGHQ), the Canadian Forces Electronic Warfare Centre (CFEWC), the Canadian Forces Network Operations Centre (CFNOC), the Canadian Forces Signals Intelligence Operations Centre (CFSOC), the Canadian Forces Station (CFS) Leitrim, and the 764 Communications Squadron. In June 2011 the Canadian Armed Forces Chief of Force Development announced the establishment of a new organization, the Directorate of Cybernetics, headed by a Brigadier-General, the Director General Cyber (DG Cyber). Within that directorate, the newly established CAF Cyber Task Force has been tasked to design and build cyber warfare capabilities for the Canadian Armed Forces.

Royal Canadian Medical Service
The Royal Canadian Medical Service is a personnel branch of the CAF, consisting of all members of medical occupations.

Royal Canadian Dental Corps
The Royal Canadian Dental Corps is a personnel branch of the CAF.

Canadian Forces Health Services Group
The Health Services Group is a joint formation that includes over 120 general or specialized units and detachments providing health services to the Canadian Armed Forces. With few exceptions, all elements are under command of the Commander, who may also be appointed Surgeon General when the position is filled by a medical officer, for domestic support and force generation, or temporarily assigned under command of a deployed Joint Task Force through Canadian Joint Operations Command.

Canadian Armed Forces Reserve Force
The Canadian Armed Forces have a total reserve force of approximately 50,000 primary and supplementary that can be called upon in times of national emergency or threat. For the components and sub-components of the Canadian Armed Forces Reserve Force, the order of precedence follows: after 2002 there is no sub-division of the Supplementary Reserve.
 * (1) Primary Reserve (26,000),
 * (2) Supplementary Reserve (11,000) Prior to 2002 this consisted of:
 * (a) Supplementary Ready Reserve, and
 * (b) Supplementary Holding Reserve,
 * (3) Cadet Organizations Administration and Training Service (7,500), and
 * (4) Canadian Rangers (5,000).

Primary Reserve
Approximately 26,000 soldiers, sailors, and airmen, trained to the level of and interchangeable with their Regular Force counterparts, and posted to CAF operations or duties on a casual or ongoing basis, make up the Primary Reserve. This group is represented, though not commanded, at NDHQ by the chief of Reserves and Employer Support, who is usually a major-general or rear-admiral, and is divided into four components that are each operationally and administratively responsible to its corresponding environmental command in the Regular Force—the Naval Reserve (NAVRES), Land Force Reserve (LFR), and Air Reserve (AIRRES)—in addition to one force that does not fall under an environmental command, the Health Services Reserve under the Canadian Forces Health Services Group.

Cadet Organizations Administration and Training Service
The Cadet Organizations Administration and Training Service (COATS) consists of officers and non-commissioned members who conduct training, safety, supervision and administration of nearly 60,000 cadets aged 12 to 18 years in the Canadian Cadet Organization. The majority of members in COATS are officers of the Cadet Instructors Cadre (CIC) branch of the CAF. Members of the Reserve Force Sub-Component COATS who are not employed part-time (Class A) or full-time (Class B) may be held on the "Cadet Instructor Supplementary Staff List" (CISS List) in anticipation of employment in the same manner as other reservists are held as members of the Supplementary Reserve.

Canadian Rangers
The Canadian Rangers, who provide surveillance and patrol services in Canada's arctic and other remote areas, are an essential reserve force component used for Canada's exercise of sovereignty over its northern territory.

Defence policy
Since the Second World War, Canadian defence policy has consistently stressed three overarching objectives:
 * The defence of Canada itself;
 * The defence of North America in co-operation with US forces;
 * Contributing to broader international security.

During the Cold War, a principal focus of Canadian defence policy was contributing to the security of Europe in the face of the Soviet military threat. Toward that end, Canadian ground and air forces were based in Europe from the early 1950s until the early 1990s.

However, since the end of the Cold War, as the North Atlantic Treaty Organization (NATO) has moved much of its defence focus "out of area", the Canadian military has also become more deeply engaged in international security operations in various other parts of the world—most notably in Afghanistan from 2002 to 2014.

The basis for current Canadian defence capability objectives was originally set in the Canada First Defence Strategy, introduced by the former Harper Government in 2008 but is now updated through the Liberal Government's 2017 defence strategy, Strong, Secure and Engaged (SSE). The SSE pledged greater funding to support the Canadian military (particularly in relation to the National Shipbuilding Procurement Strategy) in its primary tasks related to the defence of Canada, the defence of North America and contributing to global security.

In addition to its core missions, the Canadian Armed Forces also contribute to the conduct of Canadian defence diplomacy through a range of activities, including the deployment of Canadian Defence Attachés, participation in bilateral and multilateral military forums (e.g. the System of Cooperation Among the American Air Forces), ship and aircraft visits, military training and cooperation, and other such outreach and relationship-building efforts.

Military expenditures
The Constitution of Canada gives the federal government exclusive responsibility for national defence, and expenditures are thus outlined in the federal budget. For the 2016–17 fiscal year, the amount allocated for defence spending was CA$18.6billion. The estimated expenditure in 2021 was CA$24.3billion. In April 2022, the government announced in its budget that it intends to increase defence spending by CA$8billion over the next five years.

The federal government now factors in military-related spending from departments such as Veterans Affairs, Public Works, and the Treasury Board when calculating "defence spending". It is believed that this move was made to improve Canada's defence-related NATO reporting metrics.

In 2024 the Canadian Federal government announced plans to increase defence spending by 77 billon dollars over the next twenty years at a rate of 1.76% of GDP. The funds are to be allocated toward new submarines (twelve are planned) and overall force modernisation.

Uniforms
Although the Canadian Armed Forces are a single service, there are four similar but distinctive environmental uniforms (DEUs): navy blue (which is actually black) for the navy, rifle green for the army, light blue for the air force, and khaki for special operations. CAF members in operational occupations generally wear the DEU to which their occupation "belongs." CAF members in non-operational occupations (the "purple" trades) are allocated a uniform according to the "distribution" of their branch within the CAF, the association of the branch with one of the former services, and the individual's initial preference. Therefore, on any given day, in any given CAF unit, multiple coloured uniforms may be seen.

The uniforms of the CAF are sub-divided into five orders of dress:
 * Ceremonial dress, including regimental full dress, patrol dress, naval high-collar whites, and service-dress uniforms with ceremonial accoutrements such as swords, white web belts, gloves, etc.
 * Mess dress, which ranges from full mess kit with mess jacket, cummerbund, or waistcoat, etc., to service dress with bow tie
 * Service dress, also called a walking-out or duty uniform, is the military equivalent of the business suit, with an optional white summer uniform for naval CF members
 * Operational dress, an originally specialized uniform for wear in an operational environment, is now for everyday wear on base or in garrison
 * Occupational dress, which is specialized uniform articles for particular occupations (e.g., medical, dental, firefighter)

Only service dress is suitable for CAF members to wear on any occasion, barring "dirty work" or combat. With gloves, swords, and medals (No. 1 or 1A), it is suitable for ceremonial occasions and "dressed down" (No. 3 or lower), it is suitable for daily wear. Generally, after the elimination of base dress (although still defined for the Air Force uniform), the operational dress is now the daily uniform worn by most members of the CF, unless service dress is prescribed (such as at the NDHQ, on parades, at public events, etc.). Approved parkas are authorized for winter wear in cold climates and a light casual jacket is also authorized for cooler days. Units of the Canadian Army, Royal Canadian Air Force, and cadets of the Royal Military College of Canada also wear full-dress uniforms. The Army's universal full-dress uniforms includes a scarlet tunic, midnight blue trousers with a scarlet trouser stripe. However, many regiments in the Canadian Army maintain authorized regimental differences from the Army's universal full dress, most notably for its armoured units, Scottish regiments, and Voltigeur/Rifle regiments. The full-dress uniform for cadets at Royal Military College is similar to the Army's universal full dress uniform. Full dress uniforms for units of the Royal Canadian Air Force include a blue tunic, and blue trousers and facings. Naval full dress includes a navy blue tunic and trousers with white facings, although the Canadian Forces dress instructions state that naval full dress is no longer worn.

Authorized headdresses for the Canadian Armed Forces is the: beret, wedge cap, ballcap, Yukon cap, and tuque (toque). Each is coloured according to the distinctive uniform worn: navy (white or navy blue), army (rifle green or "regimental" colour), and air force (light blue). Adherents of the Sikh faith may wear uniform turbans (dastar) (or patka, when operational) and Muslim women may wear uniform tucked hijabs under their authorized headdress. Jews may wear yarmulke under their authorized headdress and when bareheaded. The beret is probably the most widely worn headgear and is worn with almost all orders of dress (with the exception of the more formal orders of Navy and Air Force dress), and the colour of which is determined by the wearer's environment, branch, or mission. Naval personnel, however, seldom wear berets, preferring either service caps or authorized ballcaps (shipboard operational dress), which only the Navy wear. Air Force personnel, particularly officers, prefer the wedge cap to any other form of headdress. There is no naval variant of the wedge cap. The Yukon cap and tuque are worn only with winter dress, although clearance and combat divers may wear tuques year-round as a watch cap. Soldiers in Highland, Scottish, and Irish regiments generally wear an alternative headdress, including the glengarry, balmoral, tam o'shanter, and caubeen instead of the beret. The officer cadets of both Royal Military Colleges wear gold-braided "pillbox" (cavalry) caps with their ceremonial dress and have a unique fur "Astrakhan" for winter wear. The CAF wears the CG634 helmet.

Symbolism and honours
The Canadian Forces have derived many of their traditions and symbols from the Army, Navy, and Air Force of the United Kingdom, including those with royal elements. Contemporary icons and rituals, however, have evolved to include elements reflective of Canada and the Canadian monarchy. Members of the country's royal family maintain personal relationships with the forces' divisions and regiments.

The monarch is regarded as the fount of honour and the Canadian system of orders, decorations, and medals includes numerous specifically for the military, such as the Victoria Cross, Order of Military Merit, Cross of Valour, Star of Courage, and Medal of Bravery. The Victoria Cross is the highest honour in Canada. The British version was presented to 94 Canadians and two Newfoundlanders between its creation in 1856 and 1993, when the Canadian Victoria Cross was instituted. No Canadian has received either honour since 1945.

During the unification of the forces in the 1960s, a renaming of the branches took place, resulting in the loss of the royal designations for the Navy and Air Force. On 16 August 2011, the federal Cabinet announced that Air Command was re-assuming the Air Force's original name, Royal Canadian Air Force; Land Force Command the name Canadian Army; and Maritime Command the name Royal Canadian Navy. The change was made to better reflect Canada's military heritage and align Canada with other Commonwealth realms whose militaries use the royal designation.

title: Canadian Armed Forces