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Metamorphic rock

Metamorphic rocks arise from the transformation of existing rock to new types of rock in a process called metamorphism. The original rock (protolith) is subjected to temperatures greater than 150 to 200 C and, often, elevated pressure of 100 MPa or more, causing profound physical or chemical changes. During this process, the rock remains mostly in the solid state, but gradually recrystallizes to a new texture or mineral composition. The protolith may be an igneous, sedimentary, or existing metamorphic rock.

Metamorphic rocks make up a large part of the Earth's crust and form 12% of the Earth's land surface. They are classified by their protolith, their chemical and mineral makeup, and their texture. They may be formed simply by being deeply buried beneath the Earth's surface, where they are subject to high temperatures and the great pressure of the rock layers above. They can also form from tectonic processes such as continental collisions, which cause horizontal pressure, friction, and distortion. Metamorphic rock can be formed locally when rock is heated by the intrusion of hot molten rock called magma from the Earth's interior. The study of metamorphic rocks (now exposed at the Earth's surface following erosion and uplift) provides information about the temperatures and pressures that occur at great depths within the Earth's crust.

Some examples of metamorphic rocks are gneiss, slate, marble, schist, and quartzite. Slate and quartzite tiles are used in building construction. Marble is also prized for building construction and as a medium for sculpture. On the other hand, schist bedrock can pose a challenge for civil engineering because of its pronounced planes of weakness.

Origin
Metamorphic rocks form one of the three great divisions of rock types. They are distinguished from igneous rocks, which form from molten magma, and sedimentary rocks, which form from sediments eroded from existing rock or precipitated chemically from bodies of water.

Metamorphic rocks are formed when existing rock is transformed physically or chemically at elevated temperature, without actually melting to any great degree. The importance of heating in the formation of metamorphic rock was first noted by the pioneering Scottish naturalist, James Hutton, who is often described as the father of modern geology. Hutton wrote in 1795 that some rock beds of the Scottish Highlands had originally been sedimentary rock but had been transformed by great heat.

Hutton also speculated that pressure was important in metamorphism. This hypothesis was tested by his friend, James Hall, who sealed chalk into a makeshift pressure vessel constructed from a cannon barrel and heated it in an iron foundry furnace. Hall found that this produced a material strongly resembling marble, rather than the usual quicklime produced by heating of chalk in the open air. French geologists subsequently added metasomatism, the circulation of fluids through buried rock, to the list of processes that help bring about metamorphism. However, metamorphism can take place without metasomatism (isochemical metamorphism) or at depths of just a few hundred meters where pressures are relatively low (for example, in contact metamorphism).

Metamorphic processes change the texture or mineral composition of the metamorphosed rock.

Mineralogical changes

Metasomatism can change the bulk composition of a rock. Hot fluids circulating through pore space in the rock can dissolve existing minerals and precipitate new minerals. Dissolved substances are transported out of the rock by the fluids while new substances are brought in by fresh fluids. This can obviously change the mineral makeup of the rock.

However, changes in the mineral composition can take place even when the bulk composition of the rock does not change. This is possible because all minerals are stable only within certain limits of temperature, pressure, and chemical environment. For example, at atmospheric pressure, the mineral kyanite transforms to andalusite at a temperature of about 190 C. Andalusite, in turn, transforms to sillimanite when the temperature reaches about 800 C. All three have the identical composition, Al2SiO5. Likewise, forsterite is stable over a broad range of pressure and temperature in marble, but is converted to pyroxene at elevated pressure and temperature in more silicate-rich rock containing plagioclase, with which the forsterite reacts chemically.

Many complex high-temperature reactions may take place between minerals without them melting, and each mineral assemblage produced indicates the temperatures and pressures at the time of metamorphism. These reactions are possible because of rapid diffusion of atoms at elevated temperature. Pore fluid between mineral grains can be an important medium through which atoms are exchanged.

Textural changes
The change in the particle size of the rock during the process of metamorphism is called recrystallization. For instance, the small calcite crystals in the sedimentary rock limestone and chalk change into larger crystals in the metamorphic rock marble. In metamorphosed sandstone, recrystallization of the original quartz sand grains results in very compact quartzite, also known as metaquartzite, in which the often larger quartz crystals are interlocked. Both high temperatures and pressures contribute to recrystallization. High temperatures allow the atoms and ions in solid crystals to migrate, thus reorganizing the crystals, while high pressures cause solution of the crystals within the rock at their point of contact.

Description
Metamorphic rocks are characterized by their distinctive mineral composition and texture.

Metamorphic minerals
Because every mineral is stable only within certain limits, the presence of certain minerals in metamorphic rocks indicates the approximate temperatures and pressures at which the rock underwent metamorphism. These minerals are known as index minerals. Examples include sillimanite, kyanite, staurolite, andalusite, and some garnet.

Other minerals, such as olivines, pyroxenes, hornblende, micas, feldspars, and quartz, may be found in metamorphic rocks but are not necessarily the result of the process of metamorphism. These minerals can also form during the crystallization of igneous rocks. They are stable at high temperatures and pressures and may remain chemically unchanged during the metamorphic process.

Texture
Metamorphic rocks are typically more coarsely crystalline than the protolith from which they formed. Atoms in the interior of a crystal are surrounded by a stable arrangement of neighboring atoms. This is partially missing at the surface of the crystal, producing a surface energy that makes the surface thermodynamically unstable. Recrystallization to coarser crystals reduces the surface area and so minimizes the surface energy.

Although grain coarsening is a common result of metamorphism, rock that is intensely deformed may eliminate strain energy by recrystallizing as a fine-grained rock called mylonite. Certain kinds of rock, such as those rich in quartz, carbonate minerals, or olivine, are particularly prone to form mylonites, while feldspar and garnet are resistant to mylonitization.

Foliation

Many kinds of metamorphic rocks show a distinctive layering called foliation (derived from the Latin word folia, meaning "leaves"). Foliation develops when a rock is being shortened along one axis during recrystallization. This causes crystals of platy minerals, such as mica and chlorite, to become rotated such that their short axes are parallel to the direction of shortening. This results in a banded, or foliated, rock, with the bands showing the colors of the minerals that formed them. Foliated rock often develops planes of cleavage. Slate is an example of a foliated metamorphic rock, originating from shale, and it typically shows well-developed cleavage that allows slate to be split into thin plates.

The type of foliation that develops depends on the metamorphic grade. For instance, starting with a mudstone, the following sequence develops with increasing temperature: The mudstone is first converted to slate, which is a very fine-grained, foliated metamorphic rock, characteristic of very low grade metamorphism. Slate in turn is converted to phyllite, which is fine-grained and found in areas of low grade metamorphism. Schist is medium to coarse-grained and found in areas of medium grade metamorphism. High-grade metamorphism transforms the rock to gneiss, which is coarse to very coarse-grained.

Rocks that were subjected to uniform pressure from all sides, or those that lack minerals with distinctive growth habits, will not be foliated. Marble lacks platy minerals and is generally not foliated, which allows its use as a material for sculpture and architecture.

Classification
Metamorphic rocks are one of the three great divisions of all rock types, and so there is a great variety of metamorphic rock types. In general, if the protolith of a metamorphic rock can be determined, the rock is described by adding the prefix meta- to the protolith rock name. For example, if the protolith is known to be basalt, the rock will be described as a metabasalt. Likewise, a metamorphic rock whose protolith is known to be a conglomerate will be described as a metaconglomerate. For a metamorphic rock to be classified in this manner, the protolith should be identifiable from the characteristics of the metamorphic rock itself, and not inferred from other information.

Under the British Geological Survey's classification system, if all that can be determined about the protolith is its general type, such as sedimentary or volcanic, the classification is based on the mineral mode (the volume percentages of different minerals in the rock). Metasedimentary rocks are divided into carbonate-rich rock (metacarbonates or calcsilicate-rocks) or carbonate-poor rocks, and the latter are further classified by the relative abundance of mica in their composition. This ranges from low-mica psammite through semipelite to high-mica pelite. Psammites composed mostly of quartz are classified as quartzite. Metaigneous rocks are classified similarly to igneous rocks, by silica content, from meta-ultramafic-rock (which is very low in silica) to metafelsic-rock (with a high silica content).

Where the mineral mode cannot be determined, as is often the case when rock is first examined in the field, then classification must be based on texture. The textural types are: A hornfels is a granofels that is known to result from contact metamorphism. A slate is a fine-grained metamorphic rock that easily splits into thin plates but shows no obvious compositional layering. The term is used only when very little else is known about the rock that would allow a more definite classification. Textural classifications may be prefixed to indicate a sedimentary protolith (para-, such as paraschist) or igneous protolith (ortho-, such as orthogneiss). When nothing is known about the protolith, the textural name is used without a prefix. For example, a schist is a rock with schistose texture whose protolith is uncertain.
 * Schists, which are medium-grained strongly foliated rocks. These show the most well-developed schistosity, defined as the extent to which platy minerals are present and are aligned in a single direction, so that the rock easily splits into plates less than a centimeter (0.4 inches) thick.
 * Gneisses, which are more coarse grained and show thicker foliation that schists, with layers over 5mm thick. These show less well-developed schistosity.
 * Granofels, which show no obvious foliation or schistosity.

Special classifications exist for metamorphic rocks with a volcaniclastic protolith or formed along a fault or through hydrothermal circulation. A few special names are used for rocks of unknown protolith but known modal composition, such as marble, eclogite, or amphibolite. Special names may also be applied more generally to rocks dominated by a single mineral, or with a distinctive composition or mode or origin. Special names still in wide use include amphibolite, greenschist, phyllite, marble, serpentinite, eclogite, migmatite, skarn, granulite, mylonite, and slate.

The basic classification can be supplemented by terms describing mineral content or texture. For example, a metabasalt showing weak schistosity might be described as a gneissic metabasalt, and a pelite containing abundant staurolite might be described as a staurolite pelite.

Metamorphic facies
A metamorphic facies is a set of distinctive assemblages of minerals that are found in metamorphic rock that formed under a specific combination of pressure and temperature. The particular assemblage is somewhat dependent on the composition of that protolith, so that (for example) the amphibolite facies of a marble will not be identical with the amphibolite facies of a pelite. However, the facies are defined such that metamorphic rock with as broad a range of compositions as is practical can be assigned to a particular facies. The present definition of metamorphic facies is largely based on the work of the Finnish geologist, Pentti Eskola, with refinements based on subsequent experimental work. Eskola drew upon the zonal schemes, based on index minerals, that were pioneered by the British geologist, George Barrow.

The metamorphic facies is not usually considered when classifying metamorphic rock based on protolith, mineral mode, or texture. However, a few metamorphic facies produce rock of such distinctive character that the facies name is used for the rock when more precise classification is not possible. The chief examples are amphibolite and eclogite. The British Geological Survey strongly discourages the use of granulite as a classification for rock metamorphosed to the granulite facies. Instead, such rock will often be classified as a granofels. However, this approach is not universally accepted.

Occurrence
Metamorphic rocks make up a large part of the Earth's crust and form 12% of the Earth's land surface. The lower continental crust is mostly metamafic-rock and pelite which have reached the granulite facies. The middle continental crust is dominated by metamorphic rock that has reached the amphibolite facies. Within the upper crust, which is the only part of the Earth's crust geologists can directly sample, metamorphic rock forms only from processes that can occur at shallow depth. These are contact (thermal) metamorphism, dynamic (cataclastic) metamorphism, hydrothermal metamorphism, and impact metamorphism. These processes are relatively local in occurrence and usually reach only the low-pressure facies, such as the hornfels and sanidinite facies. Most metamorphic rock is formed by regional metamorphism in the middle and lower crust, where the rock reaches the higher-pressure metamorphic facies. This rock is found at the surface only where extensive uplift and erosion has exhumed rock that was formerly much deeper in the crust.

Orogenic belts
Metamorphic rock is extensively exposed in orogenic belts produced by the collision of tectonic plates at convergent boundaries. Here formerly deeply buried rock has been brought to the surface by uplift and erosion. The metamorphic rock exposed in orogenic belts may have been metamorphosed simply by being at great depths below the Earth's surface, subjected to high temperatures and the great pressure caused by the immense weight of the rock layers above. This kind of regional metamorphism is known as burial metamorphism. This tends to produce low-grade metamorphic rock. Much more common is metamorphic rock formed during the collision process itself. The collision of plates causes high temperatures, pressures and deformation in the rocks along these belts. Metamorphic rock formed in these settings tends to shown well-developed schistosity.

Metamorphic rock of orogenic belts shows a variety of metamorphic facies. Where subduction is taking place, the basalt of the subducting slab is metamorphosed to high-pressure metamorphic facies. It initially undergoes low-grade metamorphism to metabasalt of the zeolite and prehnite-pumpellyite facies, but as the basalt subducts to greater depths, it is metamorphosed to the blueschist facies and then the eclogite facies. Metamorphism to the eclogite facies releases a great deal of water vapor from the rock, which drives volcanism in the overlying volcanic arc. Eclogite is also significantly denser than blueschist, which drives further subduction of the slab deep into the Earth's mantle. Metabasalt and blueschist may be preserved in blueschist metamorphic belts formed by collisions between continents. They may also be preserved by obduction onto the overriding plate as part of ophiolites. Eclogites are occasionally found at sites of continental collision, where the subducted rock is rapidly brought back to the surface, before it can be converted to the granulite facies in the hot upper mantle. Many samples of eclogite are xenoliths brought to the surface by volcanic activity.

Many orogenic belts contain higher-temperature, lower-pressure metamorphic belts. These may form through heating of the rock by ascending magmas of volcanic arcs, but on a regional scale. Deformation and crustal thickening in an orogenic belt may also produce these kinds of metamorphic rocks. These rocks reach the greenschist, amphibolite, or granulite facies and are the most common of metamorphic rocks produced by regional metamorphosis. The association of an outer high-pressure, low-temperature metamorphic zone with an inner zone of low-pressure, high-temperature metamorphic rocks is called a paired metamorphic belt. The main islands of Japan show three distinct paired metamorphic belts, corresponding to different episodes of subduction.

Metamorphic core complexes
Metamorphic rock is also exposed in metamorphic core complexes, which form in region of crustal extension. They are characterized by low-angle faulting that exposes domes of middle or lower crust metamorphic rock. These were first recognized and studied in the Basin and Range Province of southwestern North America, but are also found in southern Aegean Sea, in the D'Entrecasteaux Islands, and in other areas of extension.

Granite-greenstone belts
Continental shields are regions of exposed ancient rock that make up the stable cores of continents. The rock exposed in the oldest regions of shields, which is of Archean age (over 2500 million years old), mostly belong to granite-greenstone belts. The greenstone belts contain metavolcanic and metasedimentary rock that has undergone a relatively mild grade of metamorphism, at temperatures of 350-500 C and pressures of 200-500 MPa. They can be divided into a lower group of metabasalts, including rare metakomatiites; a middle group of meta-intermediate-rock and meta-felsic-rock; and an upper group of metasedimentary rock.

The greenstone belts are surrounded by high-grade gneiss terrains showing highly deformed low-pressure, high-temperature (over 500 C) metamorphism to the amphibolite or granulite facies. These form most of the exposed rock in Archean cratons.

The granite-greenstone belts are intruded by a distinctive group of granitic rocks called the tonalite-trondhjemite-granodiorite or TTG suite. These are the most voluminous rocks in the craton and may represent an important early phase in the formation of continental crust.

Mid-ocean ridges
Mid-ocean ridges are where new oceanic crust is formed as tectonic plates move apart. Hydrothermal metamorphism is extensive here. This is characterized by metasomatism by hot fluids circulating through the rock. This produces metamorphic rock of the greenschist facies. The metamorphic rock, serpentinite, is particularly characteristic of these settings, and represents chemical transformation of olivine and pyroxene in ultramafic rock to serpentine group minerals.

Contact aureoles
Contact metamorphism takes place when magma is injected into the surrounding solid rock (country rock). The changes that occur are greatest wherever the magma comes into contact with the rock because the temperatures are highest at this boundary and decrease with distance from it. Around the igneous rock that forms from the cooling magma is a metamorphosed zone called a contact aureole. Aureoles may show all degrees of metamorphism from the contact area to unmetamorphosed (unchanged) country rock some distance away. The formation of important ore minerals may occur by the process of metasomatism at or near the contact zone. Contact aureoles around large plutons may be as much as several kilometers wide.

The term hornfels is often used by geologists to signify those fine grained, compact, non-foliated products of contact metamorphism. The contact aureole typically shows little deformation, and so hornfels is usually devoid of schistosity and forms a tough, equigranular rock. If the rock was originally banded or foliated (as, for example, a laminated sandstone or a foliated calc-schist) this character may not be obliterated, and a banded hornfels is the product. Contact metamorphism close to the surface produces distinctive low-pressure metamorphic minerals, such as spinel, andalusite, vesuvianite, or wollastonite.

Similar changes may be induced in shales by the burning of coal seams. This produces a rock type named clinker.

There is also a tendency for metasomatism between the igneous magma and sedimentary country rock, whereby the chemicals in each are exchanged or introduced into the other. In that case, hybrid rocks called skarn arise.

Other occurrences
Dynamic (cataclastic) metamorphism takes place locally along faults. Here intense shearing of the rock typically forms mylonites.

Impact metamorphism is unlike other forms of metamorphism in that it takes place during impact events by extraterrestrial bodies. It produces rare ultrahigh pressure metamorphic minerals, such as coesite and stishovite. Coesite is rarely found in eclogite brought to the surface in kimberlite pipes, but the presence of stishovite is unique to impact structures.

Uses
Slate tiles are used in construction, particularly as roof shingle.

Quartzite is sufficiently hard and dense that it is difficult to quarry. However, some quartzite is used as dimension stone, often as slabs for flooring, walls, or stairsteps. About 6% of crushed stone, used mostly for road aggregate, is quartzite.

Marble is also prized for building construction and as a medium for sculpture.

Hazards
Schistose bedrock can pose a challenge for civil engineering because of its pronounced planes of weakness. A hazard may exist even in undisturbed terrain. On August 17, 1959, a magnitude 7.2 earthquake destabilized a mountain slope near Hebgen Lake, Montana, composed of schist. This caused a massive landslide that killed 26 people camping in the area.

Metamorphosed ultramafic rock contains serpentine group minerals, which includes varieties of asbestos that pose a hazard to human health.

title: Metamorphic rock


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Talk:Passchendale

I think the correct spelling is "Passchendaele" but I could be wrong...

 * You're absolutely right. Well spotted - I missed that one! User:David Parker

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title: Talk:Passchendale


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National Security Act of 1947

The National Security Act of 1947 (Pub.L. 80-253, 61 Stat. 495, enacted July 26, 1947) was a law enacting major restructuring of the United States government's military and intelligence agencies following World War II. The majority of the provisions of the act took effect on September 18, 1947, the day after the Senate confirmed James Forrestal as the first secretary of defense.

The act merged the Department of the Army (renamed from the Department of War), the Department of the Navy, and the newly established Department of the Air Force (DAF) into the National Military Establishment (NME). The act also created the position of the secretary of defense as the head of the NME. It established the United States Air Force under the DAF, which worked to separate the Army Air Forces into its own service. It also protected the Marine Corps as an independent service under the Department of the Navy. Aside from the unification of the three military departments, the act established the National Security Council and the Central Intelligence Agency, the latter of which is headed by the Director of Central Intelligence.

The legislation was a result of efforts by Harry S. Truman beginning in 1944. President Truman proposed the legislation to Congress on February 26, 1947. The bill was introduced in the U.S. House of Representatives on February 28, 1947, and in the Senate on March 3, 1947. Senator Chan Gurney was the bill's sponsor. Senator Gurney, as chairman of the Senate Committee on Armed Services, led committee hearings for the bill from mid-March to early May. The bill passed in the Senate on July 9, 1947, and in the House on July 19, 1947. The Senate agreed to a related House resolution (80 H.Con.Res. 70) on July 16, 1947. The bill received bipartisan support and was passed in both chambers by voice vote. The National Security Act of 1947 was signed into law by President Truman on July 26, 1947, while aboard his VC-54C presidential aircraft Sacred Cow.

Background
Before World War II, congressional committees oversaw the Cabinet-level War Department and Navy Department, and while each department was separate from the other, both were able to obtain aircraft. During this time, the President had a level of authority over the departments. After the attack on Pearl Harbor, Congress passed the First War Powers Act, which authorized the sitting president "to make such redistribution of functions among executive agencies as he may deem necessary" provided that it is "only in matters relating to the conduct of the present war" and that these authorities will expire "six months after the termination of the war."

During World War II, then-chief of staff of the Army George Marshall brought the idea of unification of the armed services to President Franklin D. Roosevelt, but "he was routinely rebuffed on the grounds that a substantive discussion of this option while the country was at war might undermine the war effort." On August 26, 1944, future president Harry S. Truman, who was a senator at the time, wrote that "under such a set-up [of unification] another Pearl Harbor will not have to be feared" in his article "Our Armed Forces Must Be United". Military problems apparent during World War II that turned attention to the need for unification were a lack of preparedness, a lack of attention to "logistics in war," and a "lack of coordination among the services."

In the years following the war, President Truman had been pushing for the unification of the armed services until the passing of the National Security Act of 1947, having research conducted on the topic since 1944 and having expressed his desire for Congress to act on the issue as early as April 6, 1946. He stated in a letter to Congress on June 15, 1946, that he "consider[s] it vital that we have a unified force for our national defense." President Truman had worked closely with the Army and the Navy to establish a consensus, but the departments struggled to come to an agreement until 1947.

Legislative history
On February 26, 1947, President Harry S. Truman sent a bill proposal to Congress detailing the creation of a "National Defense Establishment". Representative Clare E. Hoffman (R-MI) introduced the bill as H.R. 2319 to the House of Representatives on February 28, 1947; it was then referred to the Committee on Expenditures in the Executive Departments.

Senator Chan Gurney (R-SD) introduced the bill to the Senate as S. 758 on March 3, 1947. Due to conflict over which committee the bill was to be referred to, as well as the focus the Senate had on the legislative budget at the time, the bill was not able to be introduced in the Senate sooner.

Congressional hearings
On March 18, 1947, then-Chairman Senator Gurney held congressional hearings in the Senate Committee on Armed Services on the bill that would become the National Security Act of 1947. The hearings were held in three parts: Part 1 hearings were held on March 18, March 20, March 25, March 26, and April 1–3, 1947; Part 2 hearings were held on April 8, April 9, April 15, April 18, April 22, April 24, and April 25, 1947; and Part 3 hearings were held on April 30, May 2, May 6, May 7, and May 9, 1947.

The witnesses at the hearings largely spoke in support of the bill, either overall or with adjustments. Major witnesses of the bill who spoke in support were United States Army Chief of Staff General Dwight D. Eisenhower, Secretary of the Navy James V. Forrestal, Secretary of War Robert P. Patterson, Chief of Naval Operations Admiral Chester W. Nimitz, Under Secretary of War Kenneth C. Royall, Representative Walter G. Andrews (R-NY), Senator Henry Cabot Lodge (R-MA), two colonels from the Reserve Officers Association of the United States, Director of Central Intelligence Hoyt S. Vandenberg, Director of the Bureau of the Budget James E. Webb, and president of General Electric Co. Charles E. Wilson. Assistant Secretary of the Navy W. John Kenney spoke in support but expressed concerns about appropriations, while United States Army Surgeon General Norman T. Kirk expressed concern about the role of medical services. Former Senator Thomas C. Hart (R-CT) opposed the bill and proposed changes to the areas concerning the Navy and the Marine Corps. The president of the Marine Reserve Officers Association, Melvin J. Maas, stated that 95% of the Association opposes the bill and requests adjustments as it comes to the Marine Corps' role. The president of the Reserve Officers of the Naval Services (RONS), John P. Bracken, stated that the organization opposed the bill due to the lack of input they were allowed to give. Representatives from the National Guard Association opposed the bill as it stood and said that the role of the National Guard needed to be improved.

Debates
On July 7, 1947, the National Security Act of 1947 was debated for the first time in the Senate, two days after the Senate Committee on Armed Services reported the bill to the Senate. On July 9, 1947, the Senate continued debates and, with an amendment to the title, passed the bill by a voice vote.

On July 15, 1947, having already been passed in the Senate, the National Security Act of 1947 was debated in the House of Representatives. The House introduced Resolution 80 H.Con.Res. 70 on the same day. The Senate agreed to the Resolution on July 16, 1947. The House debated and passed the National Security Act of 1947, along with 80 H.R. 4214, on July 19, 1947. The conference report 80 H. rp. 1051 was agreed to in the Senate on July 24, 1947, and was agreed to in the House on July 25, 1947. The recorded votes on the bill itself "drew strong bipartisan support."

Senate
During the July 7, 1947, and July 9, 1947, debates in the Senate, members of the Senate Committee on Armed Services spoke the most, with major proponents being Senators Lodge (R-MA), Saltonstall (R-MA), Baldwin (R-CT), Morse (R-OR), Tydings (D-MD), Maybank (D-SC), and Hill (D-AL). Arguments in support of the bill included Senator Gurney's reasoning that there were "personnel problems in the Army and Navy, including the Air Forces" and that "the unification bill is a sincere and earnest attempt to put into effect by legislation a security organization which is adequate, effective, modern – and yet economical."

Senator Robertson (R-WY) was a staunch opponent of the bill, arguing that the bill would cost the country too much considering it would not be able to make the armed services any more efficient, and that the secretary of defense would have too much power.

Senator Robertson offered three amendments during debates, all of which were defeated by voice vote. Senator McCarthy (R-WI) offered an amendment that stipulated that the "existing status of Marine Corps and Naval Aviation not to be altered or diminished; their existing functions not to be transferred to other services"; the Senate debated this amendment the most until it was defeated by a 52–19 roll call vote. The only amendment that passed (by voice vote) in the Senate was offered by Senator Taft (R-OH) in which the National Security Council was to only be focused on national security matters.

House of Representatives
During the July 15, 1947, and July 19, 1947, debates in the House of Representatives, major proponents of the National Security Act of 1947 included Representatives Wadsworth (R-NY), McCormack (D-MA), and Manasco (D-AL), who were all on the Expenditures Committee as high-ranking members, and the House Armed Services Committee Chairman Walter G. Andrews (R-NY).

Opponents of the bill in the House included Representatives Cole (R-NY), Sheppard (D-CA), Rogers (R-MA), and Taber (R-NY). Representatives Cole, Sheppard, and Rogers argued that the Navy did not have enough protections under the bill, while Representative Taber argued against the budgetary aspect.

Minor amendments were passed during debates in the House. Some of Representative Cole's amendments protecting the Navy and limiting the Secretary of Defense's powers were passed by voice vote (though others he offered were defeated). Representatives Judd (R-MN) and Brown (R-OH) were able to pass amendments by voice votes that required the Director of Central Intelligence to be appointed by the president from civilian life and confirmed by the Senate, and Representative Judd passed an amendment allowing the Federal Bureau of Investigation and the Atomic Energy Commission to conduct secret operations without the inspection of the Director of Central Intelligence. Amendments offered by Representatives MacKinnon (R-MN), Case (R-NJ), Mitchell (R-IN), Clason (R-MA), and Owens (R-IL) were defeated.

Enactment
The National Security Act of 1947 was signed into law by President Truman on July 26, 1947. The bill signing took place aboard Truman's VC-54C presidential aircraft Sacred Cow, the first aircraft used for the role of Air Force One. The president was traveling to be at the bedside of his dying mother and delayed his departure until the bill was signed.

The majority of the provisions of the act took effect on September 18, 1947, the day after the Senate confirmed James Forrestal as the first secretary of defense. His power was initially limited and it was difficult for him to exercise the authority to make his office effective. This was later changed in the amendment to the act in 1949, creating what was to be the Department of Defense.

Provisions
The legislation's definition of covert action was vague, limiting oversight over the CIA's activities. It was only in the 1990s that Congress attempted to regulate covert action by prohibiting certain forms of it and enacting substantive and procedural rules for covert action.

Title I – Coordination for National Security
Title I worked to establish the National Security Council, an advisory council to the president for matters relating to national security in the realm of "domestic, foreign, and military policies" with the intent of allowing for the military departments to communicate with more efficiency. It also established the Central Intelligence Agency (CIA) under the National Security Council, led by the Director of Central Intelligence. The role of the Director of Central Intelligence, and the CIA as a whole, is as an advisory unit to the National Security Council and as a coordinator of intelligence. Finally, Title I worked to establish the National Security Resources Board, an advisory board to the President on matters relating to "the coordination of military, industrial, and civilian mobilization."

Title II – The National Military Establishment
Outlined the establishment of the National Military Establishment (NME), which consists of the Department of the Army, the Department of the Navy, and the Department of the Air Force (DAF) and is led by the secretary of defense.

Designated the Department of War to be renamed the Department of the Army, led by the secretary of the Army.

Established the Department of the Navy and outlined it to consist of the United States Marine Corps, the United States Navy, and the United States Coast Guard. The role of the United States Marine Corps was further outlined.

Established the DAF, led by the secretary of the Air Force, and allowed the secretary of defense to designate any and all functions that they deem fit to be under the DAF.

Created the United States Air Force as an agency of aviation offense and defense under the DAF, led by a Chief of Staff, United States Air Force, who in turn is directed by the Secretary of the Air Force. The Chief of Staff, United States Air Force, was designated as having equal authority as the Chief of Staff, United States Army, and the Chief of Naval Operations.

Established the War Council as an advisory council to the Secretary of Defense within the NME. The War Council consists of the Secretary of Defense, the Secretaries of the Army, the Navy, and the Air Force, the Chief of Naval Operations, and the Chiefs of Staff of the United States Army and the United States Air Force.

Title II established the Joint Chiefs of Staff within the NME as consisting "of the Chief of Staff, United States Army; the Chief of Naval Operations; the Chief of Staff, United States Air Force; and the Chief of Staff to the Commander in Chief, if there be one" with the role of being "the principal military advisers to the President and the Secretary of Defense." It also created a Joint Staff under the Joint Chiefs of Staff.

Created a Munitions Board within the NBE, which replaced the Joint Army and Navy Munitions Board, led by a Chairman and consisted of under secretaries or assistant secretaries from the Department of the Army, the Department of the Navy, and the Department of the Air Force.

Established a Research and Development Board within the NME, which replaces the Joint Research and Development Board, and that consists of a Chairman with two representatives from each military department. The Research and Development Board acts as an advisory unit on matters relating to and the conducting of military research.

Title III – Miscellaneous
Designated compensation for each of the positions created under the act, designate relative classification statuses, and specify the transfer of funds and resources.

Defined "function" as including "functions, powers, and duties", and defines "budget program" as "recommendations as to the apportionment, to the allocation and to the review of allotments of appropriated funds".

Specified separability and established the timeline of when provisions of the act would be in effect.

Amended the July 18, 1947, Presidential Succession Act to remove "Secretary of the Navy" and to replace "Secretary of War" with "Secretary of Defense".

title: National Security Act of 1947


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Chondrus crispus

Chondrus crispus—commonly called Irish moss or carrageenan moss (Irish carraigín, "little rock")—is a species of red algae which grows abundantly along the rocky parts of the Atlantic coasts of Europe and North America. In its fresh condition it is soft and cartilaginous, varying in color from a greenish-yellow, through red, to a dark purple or purplish-brown. The principal constituent is a mucilaginous body, made of the polysaccharide carrageenan, which constitutes 55% of its dry weight. The organism also consists of nearly 10% dry weight protein and about 15% dry weight mineral matter, and is rich in iodine and sulfur. When softened in water it has a sea-like odour. Because of the abundant cell wall polysaccharides, it will form a jelly when boiled, containing from 20 to 100 times its weight of water.

Description
Chondrus crispus is a relatively small sea alga, reaching up to a little more than 20 cm in length. It grows from a discoid holdfast and branches four or five times in a dichotomous, fan-like manner. The morphology is highly variable, especially the broadness of the thalli. The branches are 2–15 mm broad and firm in texture, and the color ranges from bright green towards the surface of the water, to deep red at greater depths. The gametophytes (see below) often show a blue iridescence at the tip of the fronds and fertile sporophytes show a spotty pattern. Mastocarpus stellatus (Stackhouse) Guiry is a similar species which can be readily distinguished by its strongly channelled and often somewhat twisted thalli.

Distribution
Chondrus crispus is common all around the shores of Ireland and can also be found along the coast of Europe including Iceland, the Faroe Islands, western Baltic Sea to southern Spain. It is found on the Atlantic coasts of Canada and recorded from California in the United States to Japan. However, any distribution outside the Northern Atlantic needs to be verified. There are also other species of the same genus in the Pacific Ocean, for example, C. ocellatus Holmes, C. nipponicus Yendo, C. yendoi Yamada et Mikami, C. pinnulatus (Harvey) Okamura and C. armatus (Harvey) Yamada et Mikami.

Ecology
Chondrus crispus is found growing on rock from the middle intertidal zone into the subtidal zone, all the way to the ocean floor. It is able to survive with minimal sunlight.

C. crispus is susceptible to infection from the oomycete Pythium porphyrae.

Uses

C. crispus is an industrial source of carrageenan commonly used as a thickener and stabilizer in milk products, such as ice cream and processed foods. In Europe, it is indicated as E407 or E407a. It may also be used as a thickener in calico printing and paper marbling, and for fining beer. Irish moss is frequently used with Mastocarpus stellatus (Gigartina mamillosa), Chondracanthus acicularis  (G. acicularis), and other seaweeds, which are all commonly found growing together. Carrageenan may be extracted from tropical seaweeds of the genera Kappaphycus and Eucheuma.

Life history
Irish moss undergoes an alternation of generation lifecycle common in many species of algae (see figure below). The two distinct stages are the sexual haploid gametophyte stage and the asexual diploid sporophyte stage. In addition, a third stage - the carposporophyte - is formed on the female gametophyte after fertilization. The male and female gametophytes produce gametes which fuse to form a diploid carposporophyte, which forms carpospores, which develops into the sporophyte. The sporophyte then undergoes meiosis to produce haploid tetraspores (which can be male or female) that develop into gametophytes. The three stages (male, female, and sporophyte) are difficult to distinguish when they are not fertile; however, the gametophytes often show a blue iridescence.

Scientific interest

C. crispus, compared to most other seaweeds, is well-investigated scientifically. It has been used as a model species to study photosynthesis, carrageenan biosynthesis, and stress responses. The nuclear genome was sequenced in 2013. The genome size is 105 Mbp and is coding for 9,606 genes. It is characterised by relatively few genes with very few introns. The genes are clustered together, with normally short distances between genes and then large distances between groups of genes.

title: Chondrus crispus


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Glacis

A glacis in military engineering is an artificial slope as part of a medieval castle or in early modern fortresses. They may be constructed of earth as a temporary structure or of stone in more permanent structure. More generally, a glacis is any slope, natural or artificial, which fulfils the above requirements. The etymology of this French word suggests a slope made dangerous with ice, hence the relationship with glacier.

A glacis plate is the sloped front-most section of the hull of a tank or other armoured fighting vehicle.

Ancient fortifications

A glacis could also appear in ancient fortresses, such as the one the ancient Egyptians built at Semna in Nubia. Here it was used by them to prevent enemy siege engines from weakening defensive walls.

Hillforts in Britain started to incorporate glacis around 350 BC. Those at Maiden Castle, Dorset were 25 m high.

Medieval fortifications
Glacis, also called talus, were incorporated into medieval fortifications to strengthen the walls against undermining, to hamper escalades and so that missiles dropped from the battlements would ricochet off the glacis into attacking forces.

Towards the end of the medieval period some castles were modified to make them defensible against cannons. Glacis consisting of earthen slopes faced with stones were placed in front of the curtain walls and bastions (towers) to absorb the impact of cannon shots or to deflect them. Towers were lowered to the same height as the curtain walls and converted into gun platforms.

Early modern European fortifications
Early modern European fortresses were so constructed as to keep any potential assailant under the fire of the defenders until the last possible moment. On natural, level ground, troops attacking any high work have a degree of shelter from its fire when close up to it; the glacis consists of a slope with a low grade inclined towards the top of the wall. This gave defenders a direct line of sight into the assaulting force, allowing them to efficiently sweep the field with fire from the parapet. Additionally, but secondarily, the bank of earth would shield the walls from being hit directly by cannon fire.

Though defenders on high ground already have a direct line of sight, a glacis allows the field of fire to be swept more efficiently by minimizing changes to the angle of their guns while firing. Furthermore, the glacis prevents attacking cannon from having a clear shot at the walls of a fortress, as usually these cannot be seen until the glacis is crossed and the ditch, bounded on either side by the smooth, masoned scarp and counterscarp, is reached.

Armored vehicles
The term glacis plate describes the sloped front-most section of the hull of a tank or other armored fighting vehicle, often composed of upper and lower halves. In a head-on-head armored engagement, the glacis plate is the largest and most obvious target available to an enemy gunner.

Sloped armour has two advantages: many projectiles will deflect rather than penetrate; those that attempt to will have to travel on a longer diagonal route through any given thickness of armor than if it were perpendicular to their trajectory.

Anti-tank mines that employ a tilt-rod fuze are also designed to detonate directly underneath the glacis plate. As a result, it is generally the thickest, most robust armored section of a tank, followed by the turret face and gun mantlet.

title: Glacis


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Biafra

Biafra, officially the Republic of Biafra, was a partially recognised state in West Africa  that declared independence from Nigeria and existed from 1967 until 1970. Its territory consisted of the former Eastern Region of Nigeria, predominantly inhabited by the Igbo ethnic group. Biafra was established on 30 May 1967 by Igbo military officer and Eastern Region governor C. Odumegwu Ojukwu under his presidency, following a series of ethnic tensions and military coups after Nigerian independence in 1960 that culminated in the 1966 anti-Igbo pogrom. The Nigerian military proceeded in an attempt to reclaim the territory of Biafra, resulting in the start of the Nigerian Civil War. Biafra was officially recognised by Gabon, Haiti, Ivory Coast, Tanzania, and Zambia while receiving de facto recognition and covert military support from France, Portugal, Israel, South Africa and Rhodesia. After nearly three years of war, during which around two million Biafran civilians died, President Ojukwu fled into exile in Ivory Coast as the Nigerian military approached the capital of Biafra. Philip Effiong became the second president of Biafra, and he oversaw the surrender of Biafran forces to Nigeria.

Igbo nationalism became a strong political and social force after the civil war. It has grown more militant since the 1990s, calling for the revival of Biafra as an entity. Various Biafran secessionist groups have emerged, such as the Indigenous People of Biafra, the Movement for the Actualization of the Sovereign State of Biafra, and the Biafra Zionist Front.

History
Early modern maps of Africa from the 15th to the 19th centuries, drawn from accounts written by explorers and travellers, show references to Biafar, Biafara, Biafra, and Biafares. According to the maps, the European travellers used the word Biafara to describe the region of today's West Cameroon, including an area around today's Equatorial Guinea. The German publisher Johann Heinrich Zedler, in his encyclopedia of 1731, published the exact geographical location of the capital of Biafara, namely alongside the river Rio dos Camaroes in today's Cameroon, underneath 6 degrees 10 min latitude. The words Biafara and Biafares also appear on maps from the 18th century in the area around Senegal and Gambia.

In his personal writings from his travels, a Rev. Charles W. Thomas defined the locations of islands in the Bight of Biafra as "between the parallels of longitude 5° and 9° East and latitude 4° North and 2° South".

Under independent Nigeria
In 1960, Nigeria became independent of the United Kingdom. As with many other new African states, the borders of the country did not reflect earlier ethnic, cultural, religious, or political boundaries. Thus, the northern region of the country has a Muslim majority, being primarily made up of territory of the indigenous Sokoto Caliphate. The southern population is predominantly Christian, being primarily made up of territory of the indigenous Yoruba and Igbo states in the west and east respectively. Following independence, Nigeria was demarcated primarily along ethnic lines: Hausa and Fulani majority in the north, Yoruba majority in the West, and Igbo majority in the East.

Ethnic tension had simmered in Nigeria during discussions of independence, but in the mid-twentieth century, ethnic and religious riots began to occur. In 1945 an ethnic riot flared up in Jos in which Hausa-Fulani people targeted Igbo people and left many dead and wounded. Police and Army units from Kaduna had to be brought in to restore order. A newspaper article describes the event:

"At Jos in 1945, a sudden and savage attack by Northerners took the Easterners completely by surprise, and before the situation could be brought under control, the bodies of Eastern women, men, and children littered the streets and their property worth thousands of pounds reduced to shambles"

Three hundred Igbo people were murdered in the Jos riots. In 1953 a similar riot occurred in Kano. A decade later in 1964 and during the Western political crisis, the Western Region was divided as Ladoke Akintola clashed with Obafemi Awolowo. Widespread reports of fraud tarnished the election's legitimacy. Westerners especially resented the political domination of the Northern People's Congress, many of whose candidates ran unopposed in the election. Violence spread throughout the country, and some began to flee the North and West, some to Dahomey. The apparent domination of the political system by the North, and the chaos breaking out across the country, motivated elements within the military to consider decisive action. The federal government, dominated by Northern Nigeria, allowed the crisis to unfold with the intention of declaring a state of emergency and placing the Western Region under martial law. This administration of the Nigerian federal government was widely perceived to be corrupt. In January 1966, the situation reached a breaking point. A military coup occurred during which a mixed but predominantly Igbo group of army officers assassinated 30 political leaders, including Nigeria's Prime Minister, Sir Abubakar Tafawa Balewa, and the Northern premier, Sir Ahmadu Bello. The four most senior officers of Northern origin were also killed. Nnamdi Azikiwe, the President, of Igbo extraction, and the favoured Western Region politician Obafemi Awolowo were not killed. The commander of the army, General Aguiyi Ironsi seized power to maintain order.

In July 1966, northern officers and army units staged a countercoup, killing General Aguiyi Ironsi and several southern officers. The predominantly Muslim officers named a General from a small ethnic group (the Angas) in central Nigeria, General Yakubu "Jack" Gowon, as the head of the Federal Military Government (FMG). The two coups deepened Nigeria's ethnic tensions. In September 1966, approximately 30,000 Igbo civilians were killed in the north, and some Northerners were killed in backlashes in eastern cities.

In January 1967, the military leaders Yakubu "Jack" Gowon, Chukwuemeka Ojukwu and senior police officials of each region met in Aburi, Ghana and agreed on a less centralised union of regions. The Northerners were at odds with this agreement that was known as the Aburi Accords; Obafemi Awolowo, the leader of the Western Region warned that if the Eastern Region seceded, the Western Region would also, which persuaded the northerners.

After returning to Nigeria, the federal government reneged on the agreement and unilaterally declared the creation of several new states including some that gerrymandered the Igbos in Biafra.

Nigerian civil war
On 26 May, Ojukwu decreed to secede from Nigeria after consultations with community leaders from across the Eastern Region. Four days later, Ojukwu unilaterally declared the independence of the Republic of Biafra, citing the Igbos killed in the post-coup violence as reasons for the declaration of independence. It is believed this was one of the major factors that sparked the war. The large amount of oil in the region also created conflict, as oil was already becoming a major component of the Nigerian economy. Biafra was ill-equipped for war, with fewer army personnel and less equipment than the Nigerian military, but had advantages over the Nigerian state as they were fighting in their homeland and had the support of most Biafrans.

The FMG attacked Biafra on 6 July 1967. Nigeria's initial efforts were unsuccessful; the Biafrans successfully launched their own offensive, and expansion efforts; occupying areas in the mid-Western Region in August 1967. This led to the creation of the Republic of Benin, a short lived puppet state. However, with the support of British, American and Soviet governments, Nigeria turned the tide of the war. By October 1967, the FMG had regained the land after intense fighting. In September 1968, the federal army planned what Gowon described as the "final offensive". Initially, the final offensive was neutralised by Biafran troops. In the latter stages, a Southern FMG offensive managed to break through the fierce resistance.

Due to the proliferation of television and international news organizations, the war found a global audience. 1968 saw the images of malnourished and starving Biafran children reach the mass media of Western countries and led to non-governmental organisations become involved to provide humanitarian aid, leading to the Biafran airlift.

After two-and-a-half years of war, during which almost two million Biafran civilians (three-quarters of them small children) died from starvation caused by the total blockade of the region by the Nigerian government, Biafran forces under Nigeria's motto of "No-victor, No-vanquished" surrendered to the Nigerian Federal Military Government (FMG). The surrender was facilitated by the Biafran Vice President and Chief of General Staff, Major General Philip Effiong, who assumed leadership of the Republic of Biafra after the first President, Colonel Chukwuemeka Odumegwu Ojukwu, fled to Ivory Coast. After the surrender of Biafrans, some Igbos who had fled the conflict returned to their properties but were unable to claim them back from new occupants. This became law in the Abandoned Properties Act (28 September 1979). It was purported that at the start of the civil war, Igbos withdrew their funds from Nigerian banks and converted it to the Biafran currency. After the war, bank accounts owned by Biafrans were seized and a Nigerian panel resolved to give every Igbo person an account with only 20 pounds. Federal projects in Biafra were also greatly reduced compared to other parts of Nigeria. In an Intersociety study it was found that Nigerian security forces also extorted approximately $100 million per year from illegal roadblocks and other methods from Igboland – a cultural sub-region of Biafra in what is now southern Nigeria, causing the Igbo citizenry to trust the Nigerian security forces even less than before.

Geography

The Republic of Biafra comprised over 29848 sqmi of land, with terrestrial borders shared with Nigeria to the north and west, and with Cameroon to the east. Its coast is on the Gulf of Guinea of the South Atlantic Ocean in the south.

The country's northeast bordered the Benue Hills and mountains that lead to Cameroon. Three major rivers flow from Biafra into the Gulf of Guinea: the Imo River, the Cross River and the Niger River.

The territory of the Republic of Biafra is covered nowadays by the reorganised Nigerian states of Akwa Ibom, Rivers, Cross River, Bayelsa, Ebonyi, Enugu, Anambra, Imo, Abia, Delta .and southern Kogi and Benue states.

Languages
The languages of Biafra were Igbo, Anaang, Efik, Ibibio, Ogoni, and Ijaw, among others. However, English was used as the national language.

Politics
The Republic of Biafra, a short-lived secessionist state in Nigeria from 1967 to 1970, was characterized by a unitary republic structure administered under emergency measures. It comprised an executive branch led by the Biafran president and the Biafran Cabinet, along with a judicial branch that included the Ministry of Justice, the Biafran Supreme Court, and other subordinate courts, reflecting its attempts to establish a functioning governmental system during the period of secession.

International recognition
Biafra was formally recognised by Gabon, Haiti, Ivory Coast, Tanzania, and Zambia. Other nations, that did not officially recognise Biafra, but granted de facto recognition in the form of diplomatic support or military aid, included France, Spain, Portugal, Norway, Israel, Rhodesia, South Africa, and Vatican City. Biafra received aid from non-state actors, including Joint Church Aid, foreign mercenaries, Holy Ghost Fathers of Ireland, Caritas Internationalis, and Catholic Relief Services of the United States. Doctors Without Borders also originated in response to the suffering.

Although the government of the United States under the presidency of Lyndon B. Johnson maintained an official neutral stance during the war, there was strong public support for Biafra in the United States. The American Committee to Keep Biafra Alive was founded by American activists to spread pro-Biafran propaganda. U.S. president Richard Nixon was sympathetic to Biafra. Before he won the 1968 election, he accused Nigeria of committing a genocide against Biafrans and called for the United States to intervene in the war to support Biafra. However, he was ultimately unsuccessful in his efforts to aid Biafra due to the demands of the Vietnam War.

Economy
An early institution created by the Biafran government was the Bank of Biafra, accomplished under "Decree No. 3 of 1967". The bank carried out all central banking functions including the administration of foreign exchange and the management of the public debt of the Republic. The bank was administered by a governor and four directors; the first governor, who signed on bank notes, was Sylvester Ugoh. A second decree, "Decree No. 4 of 1967", modified the Banking Act of the Federal Republic of Nigeria for the Republic of Biafra.

The bank was first located in Enugu, but due to the ongoing war, it was relocated several times. Biafra attempted to finance the war through foreign exchange. After Nigeria announced its currency would no longer be legal tender (to make way for a new currency), this effort increased. After the announcement, tons of Nigerian bank notes were transported in an effort to acquire foreign exchange. The currency of Biafra had been the Nigerian pound until the Bank of Biafra started printing out its own notes, the Biafran pound. The new currency went public on 28 January 1968, and the Nigerian pound was not accepted as an exchange unit. The first issue of the bank notes included only 5 shillings notes and 1 pound notes. The Bank of Nigeria exchanged only 30 pounds for an individual and 300 pounds for enterprises in the second half of 1968.

In 1969 new notes were introduced: £10, £5, £1, 10/- and 5/-.

It is estimated that a total of £115–140 million Biafran pounds were in circulation by the end of the conflict, with a population of about 14 million, approximately £10 per person.

Military

At the beginning of the war Biafra had 3,000 soldiers, but at the end of the war, the soldiers totalled 30,000. There was no official support for the Biafran Army by any other nation throughout the war, although arms were clandestinely acquired. Because of the lack of official support, the Biafrans manufactured many of their weapons locally. Europeans served in the Biafran cause; German-born Rolf Steiner was a lieutenant colonel assigned to the 4th Commando Brigade and Welshman Taffy Williams served as a Major until the very end of the conflict. A special guerrilla unit, the Biafran Organization of Freedom Fighters, was established, designed to emulate the insurrectionist guerrilla forces of the Viet Cong in the American – Vietnamese War, targeting Nigerian Federal Army supply lines and forcing them to shift forces to internal security efforts.

The Biafrans managed to set up a small yet effective air force. The BAF commander was Polish World War II ace Jan Zumbach. Early inventory included four World War II American bombers: two B-25 Mitchells, two B-26 Invaders (Douglas A-26) (one piloted by Zumbach), a converted Douglas DC-3 and one British de Havilland Dove. In 1968 the Swedish pilot Carl Gustaf von Rosen suggested the MiniCOIN project to General Ojukwu. By early 1969, Biafra had assembled five MFI-9Bs in neighbouring Gabon, calling them the "Biafra Babies". They were painted in green camouflage and armed with two Matra Type 122 rocket pods, each being able to carry six 68 mm SNEB anti-armour rockets under each wing and had Swedish WW2 reflex sights from old FFVS J 22s. The six aeroplanes were flown by three Swedish pilots and three Biafran pilots. In September 1969, Biafra acquired four ex-French North American T-6 Texans (T-6G), which were flown to Biafra the following month, with another aircraft lost on the ferry flight. These aircraft flew missions until January 1970 and were flown by Portuguese ex-military pilots.

Biafra also had a small improvised navy, but it never gained the success that their air force did. It was headquartered in Kidney Island, Port Harcourt, and commanded by Winifred Anuku. The Biafran Navy was made up of captured craft, converted tugs, and armour-reinforced civilian vessels armed with machine guns or captured 6-pounder guns. It mainly operated in the Niger River delta and along the Niger River.

Legacy
The international humanitarian organisation Médecins Sans Frontières originated in response to the suffering in Biafra. During the crisis, French medical volunteers, in addition to Biafran health workers and hospitals, were subjected to attacks by the Nigerian army and witnessed civilians being murdered and starved by the blockading forces. French doctor Bernard Kouchner also witnessed these events, particularly the huge number of starving children, and, when he returned to France, he publicly criticised the Nigerian government and the Red Cross for their seemingly complicit behaviour. With the help of other French doctors, Kouchner put Biafra in the media spotlight and called for an international response to the situation. These doctors, led by Kouchner, concluded that a new aid organisation was needed that would ignore political/religious boundaries and prioritise the welfare of victims.

In their study Smallpox and its Eradication, Fenner and colleagues describe how vaccine supply shortages during the Biafra smallpox campaign led to the development of the focal vaccination technique, later adopted worldwide by the World Health Organization of the United Nations, which led to the early and cost-effective interruption of smallpox transmission in West Africa and elsewhere.

In 2010, researchers from Karolinska Institutet in Sweden and University of Nigeria at Nsukka showed that Igbos born in Biafra during the years of the famine were of higher risk of suffering from obesity, hypertension and impaired glucose metabolism compared to controls born a short period after the famine had ended in the early 1970s. The findings are in line with the developmental origin of health and disease hypothesis suggesting that malnutrition in early life is a predisposing factor for cardiovascular diseases and diabetes later in life.

A 2017 paper found that Biafran "women exposed to the war in their growing years exhibit reduced adult stature, increased likelihood of being overweight, earlier age at first birth, and lower educational attainment. Exposure to a primary education program mitigates impacts of war exposure on education. War-exposed men marry later and have fewer children. War exposure of mothers (but not fathers) has adverse impacts on child growth, survival, and education. Impacts vary with age of exposure. For mother and child health, the largest impacts stem from adolescent exposure."

Post-war events and Biafran nationalism
The Movement for the Actualization of the Sovereign State of Biafra (MASSOB) emerged in 1999 as a nonviolent Biafran nationalist group, associated with Igbo nationalism. The group enacted a "re-launch" of Biafra in Aba, the commercial centre of Abia State and a major commercial centre on Igbo land. MASSOB says it is a peaceful group and advertises a 25-stage plan to achieve its goal peacefully. It has two arms of government, the Biafra Government in Exile and the Biafra Shadow Government. MASSOB accuses Nigeria of marginalising Biafran people. Since August 1999, protests have erupted in cities across Nigeria's south-east. Though peaceful, the protesters have been routinely attacked by the Nigerian police and army, with large numbers of people reportedly killed. Many others have been injured and/or arrested.

On 29 May 2000, the Lagos Guardian newspaper reported that the former president Olusegun Obasanjo commuted to retirement the dismissal of all military persons, soldiers and officers, who fought for the breakaway Republic of Biafra during Nigeria's 1967–1970 civil war. In a national broadcast, he said the decision was based on the belief that "justice must at all times be tempered with mercy".

In July 2006 the Center for World Indigenous Studies reported that government-sanctioned killings were taking place in the southeastern city of Onitsha, because of a shoot-to-kill policy directed toward Biafrans, particularly members of the MASSOB.

The Nigerian federal government accuses MASSOB of violence; MASSOB's leader, Ralph Uwazuruike, was arrested in 2005 and was detained on treason charges. He has since been released and has been rearrested and released more than five times. In 2009, MASSOB leader Chief Uwazuruike launched an unrecognised "Biafran International Passport" and also launched a Biafra Plate Number in 2016 in response to persistent demand by some Biafran sympathizers in the diaspora and at home. On 16 June 2012, a Supreme Council of Elders of the Indigenous People of Biafra, another pro-Biafra organisation, was formed. The body is made up of some prominent persons in the Biafra region. They sued the Federal Republic of Nigeria for the right to self-determination. Debe Odumegwu Ojukwu, the eldest son of ex-President / General Ojukwu and a Lagos state-based lawyer was the lead counsel that championed the case.

MASSOB leader Chief Ralph Uwazuruike established Radio Biafra in the United Kingdom in 2009, with Nnamdi Kanu as his radio director; later Kanu was said to have been dismissed from MASSOB because of accusations of supporting violence. The Nigerian Government, through its broadcasting regulators, the Broadcasting Organisation of Nigerian and Nigerian Communications Commission, has sought to clamp down on Radio Biafra with limited success. On 17 November 2015, the Abia state police command seized an Indigenous People of Biafra radio transmitter in Umuahia. On 23 December 2015, Kanu was detained and charged with charges that amounted to treason against the Nigerian state. He was released on bail on 24 April 2017 after spending more than 19 months without trial of his treason charges. Self-determination is not a crime in Nigerian law.

According to the South-East Based Coalition of Human Rights Organisations, security forces under the directive of the federal government have killed 80 members of the Indigenous People of Biafra and their supporters between 30 August 2015 and 9 February 2016 in a renewed clampdown on the campaign. A report by Amnesty International between August 2015 and August 2016, at least 150 pro-Biafran activists overall were killed by Nigerian security forces, with 60 people shot in a period of two days in connection with events marking Biafran Remembrance Day. The Nigerian military killed at least 17 unarmed Biafrans in the city of Onitsha prior to a march on 30 May 2016 commemorating the 49th anniversary of Biafra's 1967 declaration of independence.

Another group is the Biafra Nations League, formerly known as Biafra Nations Youth League, which has its operational base in Bakassi Peninsula. The group is led by Princewill Chimezie Richard, alias Prince Obuka, and Ebuta Akor Takon (not to be mistaken by its former Deputy, Ebuta Ogar Takon). The group also has a Chief of Staff and operational commander who are both natives of the Bakassi. BNL have recorded a series of security clamp downs, especially in Bakassi where soldiers of 'Operations Delta Safe' apprehended the National Leader, Princewill, in the Ikang-Cameroon border area on 9 November 2016. During an attempt to mobilise a protest in support of Kanu's release, he was again re-arrested by the Nigeria Police Force in the same area on 16 January 2018 along with 20 of their supporters. Many media outlets reported that BnL is linked to the Southern Cameroons separatists; although the group confirms this, they denied involvement in violent activities in the Cameroon. The Deputy Leader, Ebuta Akor Takon is an Ejagham native, a tribe in Nigeria and also in significant number in Cameroon. BnL, which operates more in the Gulf of Guinea, has links with Dokubo Asari, a former militant leader. About 100 members of the group were reportedly arrested in Bayelsa during a meeting with Dokubo on 18 August 2019.

The Incorporated Trustees of Bilie Human Rights Initiative, representing the Indigenous People of Biafra, have filed a lawsuit against the Federal Government of Nigeria and Attorney General of the Federation, seeking the actualisation of the sovereign state of Biafra by legal means. The Federal High Court, Abuja has fixed 25 February 2019 for hearing the suit.

On 31 July 2020, the Movement for the Actualization of the Sovereign State of Biafra/Biafra Independence Movement (BIM-MASSOB) joined the Unrepresented Nations and Peoples Organization (UNPO).

Biafra Republic Government in Exile (BRGIE)
An organization for the restoration of an independent Biafran state has been led by Simon Ekpa, a Finnish politician and Biafran political activist. Ekpa describes himself as Nnamdi Kanu's disciple. He serves as the leader ("prime minister") of the Biafra Republic Government in Exile (BRGIE), since 2023.

In 2023, BRGIE inaugurated an administrative office in Maryland, United States. It initiated the process of declaring the restoration of Biafra and in October 2023, it convened a three-day convention where the possibility of a Biafran referendum was discussed, attended by over 500 Biafrans and delegates globally. On 1 February 2024, a digital E-Voting was adopted, and a self-referendum kick-started the same day. Within days of the referendum exercise, more than two million electorates were reportedly recorded. Prior to the self-referendum exercise, BRGIE had already inaugurated a committee for the Biafra restoration declaration process in January 2024.

On 24 June 2024, the Organization of Emerging African States, OEAS endorsed the referendum.

BRGIE intends to issue a "declaration of the restoration of independent state of Biafra" on December 2, 2024, at the 2024 Finland convention. A former U.S. Congressman Jim Moran advocates for Biafra independence under the BRGIE with a contract that has been in effect since June 15, 2024.

In emulation of the Lithuania historical part on the Act of the Re-Establishment of the State of Lithuania that restored Lithuania as an independent State on 11 March 1990, the Biafra restoration declaration Act was enacted with the term "Declaration of the restoration of the independent State of Biafra" adopted. The recruitment process for the drafting board to be responsible for the restoration declaration of independence was opened on 2 January 2024.

title: Biafra


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Danish West Indies

The Danish West Indies (Dansk Vestindien) or Danish Virgin Islands (Danske Jomfruøer) or Danish Antilles were a Danish colony in the Caribbean, consisting of the islands of Saint Thomas with 32 sqmi; Saint John (St. Jan) with 19 sqmi; and Saint Croix with 84 sqmi. The islands have belonged to the United States as the Virgin Islands since they were purchased in 1917. Water Island was part of the Danish West Indies until 1905, when the Danish state sold it to the East Asiatic Company, a private shipping company.

The Danish West India-Guinea Company annexed uninhabited St. Thomas(? ) in 1672; annexed St. John in 1718; and bought St. Croix from France (King Louis XV) on June 28, 1733. When the Danish West India-Guinea Company went bankrupt in 1754, King Frederik V of Denmark–Norway assumed direct control of the three islands. Britain occupied the Danish West Indies in 1801–1802 and 1807–1815 during the Napoleonic Wars.

Danish colonizers in the West Indies aimed to exploit the profitable triangular trade, involving the export of firearms and other manufactured goods to Africa in exchange for slaves, who were then transported to the Caribbean to work the sugar plantations. Caribbean colonies, in turn, exported sugar, rum and molasses to Denmark. The economy of the Danish West Indies depended on slavery. After a rebellion, slavery was officially abolished in 1848, leading to the near economic collapse of the plantations.

In 1852, the Danish parliament first debated the sale of the increasingly unprofitable colony. Denmark tried several times to sell or exchange the Danish West Indies in the late 19th and early 20th centuries: to the United States and to the German Empire, respectively. The islands were eventually sold to the United States for $25 million which took over the administration on 31 March 1917 and renamed the territory the United States Virgin Islands.

Foundation
Merchants in Copenhagen asked King Christian IV for permission to establish a West Indian trading company in 1622, but, by the time an eight-year monopoly on trade with the West Indies, Virginia, Brazil and Guinea was granted on 25 January 1625, the failure of the Danish East India and Iceland Companies and the beginning of Danish involvement in the Thirty Years' War dried up any interest in the idea. Prince Frederick organized a trading mission to Barbados in 1647 under Gabriel Gomez and the de Casseres brothers, but it and a 1651 expedition of two ships were unsuccessful. It was not until Erik Smit's private 1652 expedition aboard the Fortuna was successful that interest in the West Indies' trade grew into an interest in the creation of a new Danish colony.

Smit's 1653 expedition and a separate expedition of five ships were quite successful, but Smit's third expedition found his two vessels captured for a loss of 32,000 rigsdaler. Two years later, a Danish flotilla was destroyed by a hurricane in August. Smit returned from his fourth expedition in 1663 and formally proposed the settlement of St. Thomas to the king in April 1665. After only three weeks' deliberation, the scheme was approved and Smit was named governor. Settlers departed aboard the Eendragt on 1 July, but the expedition was ill-starred: The ship hit two large storms and suffered from fire before reaching its destination, and then it was raided by English privateers prosecuting the Second Anglo-Dutch War, in which Denmark was allied with the Netherlands. Smit died of illness, and a second band of privateers stole the ship and used it to trade with neighboring islands. Following a hurricane and a renewed outbreak of disease, the colony collapsed, with the English departing for the nearby French colony on Saint Croix, the Danes fleeing to Saint Christopher, and the Dutch assisting their countrymen on Ter Tholen in stealing everything of value, particularly the remaining Danish guns and ammunition.

Danish West India Company
The Danes formed a Board of Trade in 1668 and secured a commercial treaty with Britain, providing for the unmolested settlement of uninhabited islands, in July 1670. The Danish West India Company was organized in December and formally chartered by King Christian V the next year on 11 March 1671. Jørgen Iversen Dyppel, a successful trader on Saint Christopher, was made governor and the king provided convicts from his jails and two vessels for the establishment of the colony, the yacht Den forgyldte Krone and the frigate Færøe. Den forgyldte Krone was ordered to run ahead and wait but ended up returning to Denmark after the Færøe under Capt. Zacharias Hansen Bang was delayed for repairs in Bergen. The Færøe completed her mission alone, establishing a settlement on St. Thomas on 25 May 1672. From an original contingent of 190 – 12 officials, 116 company "employees" (indentured servants), and 62 felons and former prostitutes –  only 104 remained, 9 having escaped and 77 having died in transit. Another 75 died within the first year, leaving only 29 to carry on the colony.

In 1675, Iversen claimed St. John and placed two men there; in 1684, Governor Esmit granted it to two English merchants from Barbados but their men were chased off the island by two British sloops sent by Governor Stapleton of the British Leeward Islands. Further instructions in 1688 to establish a settlement on St. John seem not to have been acted on until Governor Bredal made an official establishment on 25 March 1718.

The islands quickly became a base for pirates attacking ships in the vicinity and also for the Brandenburg African Company. Governor Lorentz raised enormous taxes upon them and seized warehouses and cargoes of tobacco, sugar, and slaves in 1689 only to have his actions repudiated by the authorities in Copenhagen; his hasty action to seize Crab Island prohibited the Brandenburgers from establishing their own Caribbean colony, however. Possession of the island was subsequently disputed with the Scottish in 1698 and fully lost to the Spanish in 1811.

St. Croix was purchased from the French West India Company in 1733. In 1754, the islands were sold to the Danish king, Frederick V of Denmark, becoming royal Danish colonies.

Later history (1801–1917)

The first British invasion and occupation of the Danish West Indies occurred during the French Revolutionary Wars, when at the end of March 1801 a British fleet arrived at St Thomas. The Danes accepted the Articles of Capitulation the British proposed and the British occupied the islands without a shot being fired. The British occupation lasted until April 1802, when the British returned the islands to Denmark.

The second British invasion of the Danish West Indies took place during the Napoleonic Wars in December 1807 when a British fleet captured St Thomas on 22 December and Saint Croix on 25 December. The Danes did not resist and the invasion was bloodless. This British occupation of the Danish West Indies lasted until 20 November 1815, when Britain returned the islands to Denmark.

By the 1850s, the Danish West Indies had a total population of about 41,000 people. The government of the islands was under a governor-general, whose jurisdiction extended to the other Danish colonies of the group. However, because the islands formerly belonged to Great Britain, the inhabitants were English in customs and in language. The islands of that period consisted of:
 * St. Thomas had a population of 12,800 people and had sugar and cotton as its chief exports. St. Thomas city was the capital of the island, then a free port, and the chief station of the steam-packets between Southampton, in England, and the West Indies.
 * St. John had a population of about 2,600 people.
 * St. Croix, though inferior to St. Thomas in commerce, was of greater importance in extent and fertility, and, with 25,600 people, was the largest in population.

The United States had been interested in the islands since at least the 1860s when President Andrew Johnson came close to obtaining St. Thomas and St. John, as Denmark agreed to sell in 1867 for $7.5 million and the local population approved the transfer in a plebiscite, but the US Senate never voted on the treaty and it expired. The Danish Parliament rejected both a convention and a treaty in 1902.

The United States acted again in 1915 because of the islands' strategic position near the approach to the Panama Canal and because of a fear that Germany might seize them to use as U-boat bases during World War I. A referendum was held in Denmark itself on the future of the islands, which had become both a financial burden and a strategic concern. On 17 January 1917, according to the Treaty of the Danish West Indies, the Danish government sold the islands to the United States for $25 million ($ in current prices), when the United States and Denmark exchanged their respective treaty ratifications and with the US removing its objections to Denmark taking control of the whole of Greenland. Danish administration ended on 31 March 1917, when the United States took formal possession of the territory and renamed it the United States Virgin Islands. Rear Admiral James H. Oliver was the first American governor of the Danish West Indies.

At the time of the U.S. purchase of the Danish West Indies in 1917, the colony did not include Water Island, which had been sold by Denmark to the East Asiatic Company, a private shipping company, in 1905. The company eventually sold the island to the United States in 1944, during the German occupation of Denmark.

Postage stamps
St Thomas was a hub of the West Indies packet trade from 1851 to 1885. Denmark issued stamps for the Danish West Indies from 1856 onward.

Religion
The Danish West Indies were inhabited by many different cultures, and each had its own traditions and religions. The king and the church worked closely together to maintain law and order; the church was responsible for people's moral upbringing, and the king led the civil order. There was no state-sponsored religion in Denmark until 1849, but in the Danish West Indies there had always been a great deal of religious freedom. Danish authorities tended to be lenient towards religious beliefs, but required that all citizens had to observe Danish holidays. Freedom of religion was partially granted to help settle the islands, as there was a shortage of willing settlers from Europe. This worked to an extent, seeing that a large proportion of settlers were in fact Dutch and British natives fleeing religious persecution.

Jews began settling the colony in 1655, and by 1796 the first synagogue was inaugurated. In its heyday in the mid-19th century, the Jewish community made up half of the white population. One of the earliest colonial governors, Gabriel Milan, was a Sephardic Jew.

In spite of a general tolerance for religion, many African religions were not recognized because they typically revolved around belief in animism and magic, beliefs that were consistently met with scorn, and were regarded as immoral and subservient. A widespread viewpoint was that if one could convert slaves to Christianity, they could have a better life, and therefore many slaves were converted.

By 1900, with a population of 30,000, a fourth of the people were Catholics, while most of the rest were Anglicans, Moravians, or other Protestants. For decades, the Moravians had organized missions and also taken charge of the educational system.

Slavery
Chattel slavery was practiced in the Danish West Indies from at least the 1670s until the abolition of slavery in 1848. Most slaves worked on plantations, particularly in sugar production, though some also worked at the harbors.

Demographics
Slaves outnumbered whites on all islands, often by large margins. On Saint Thomas, population expansion was recorded as 422 blacks and 317 whites in 1688, 555 blacks and 383 whites in 1699, and 3,042 blacks and 547 whites in 1715 (a ratio of more than 5:1), and by 1755 slaves outnumbered whites 12:1. On Saint John, there were 677 blacks and 123 whites in 1728, 1086 blacks and 208 whites in 1733 (a ratio of more than 5:1), and by 1770 slaves outnumbered whites 19:1. On Saint Croix in 1797, there were 25,452 slaves and 2,223 whites (a ratio of more than 11:1) as well as 1,164 freedmen, and in 1815 there were 24,330 slaves and 180 whites (a ratio of more than 135:1) as well as 2,480 freedmen. At that time, freedmen (many of whom had purchased their freedom) also outnumbered whites on Saint Thomas and Saint John.

Slave trade
Trading African slaves was part of the transatlantic slave trade by Denmark–Norway around 1671, when the Danish West India Company was chartered, until 1 January 1803, when the 1792 law to abolish the slave trade came into effect.

By 1778, it was estimated that the Danes were bringing about 3,000 Africans to the Danish West Indies yearly for enslavement. These transports continued until the end of 1802, when a 1792 law by Crown Prince Regent Frederik that banned the trade of slaves came into effect.

Slave codes
Laws and regulations in the Danish West Indies were based on Denmark's laws, but the local government was allowed to adapt them to match local conditions. For example, things like animals, land, and buildings were regulated according to Danish law, but Danish law did not regulate slavery. Slaves were treated as common property, and therefore did not necessitate specific laws.

In 1733, differentiation between slaves and other property was implied by a regulation that stated that slaves had their own will and thus could behave inappropriately or be disobedient. There was a general consensus that if the slaves were punished too hard or were malnourished, the slaves would start to rebel. This was borne out by the 1733 slave insurrection on St. John, where many plantation owners and their families were killed by the Akwamu, including Breffu, before it was suppressed later the following year. In 1755 Frederick V of Denmark issued more new Regulations, in which slaves were guaranteed the right not to be separated from their children and the right to medical support during periods of illness or old age. However, the colonial government had the ability to amend laws and regulations according to local conditions, and thus the regulations were never enacted in the colony, on grounds that it was more disadvantageous than advantageous.

1733 slave insurrection
The 1733 slave insurrection on St. John, which lasted from November 1733 until August 1734, was one of the earliest and longest slave rebellions in the Americas. The insurrection started on 23 November 1733, when 150 slaves, primarily Akwamus, revolted against plantation owners and managers. The slaves captured the fort in Coral Bay and took control of most of the island.

Planters regained control by the end of May 1734, after the Akwamu were defeated by several hundred better-armed French and Swiss troops sent in April from Martinique, a French colony. Colony militia continued to hunt down maroons and finally declared the rebellion at an end in late August 1734.

Emancipation

By the 1830s and 1840s, the sugar beet industry had reduced the profitability of sugarcane. The British Slavery Abolition Act of 1833 emancipated slaves in the neighboring British West Indies, fully effective as of 1840. Abolition in the Danish West Indies was discussed, with Governor von Scholten, who had been seeking reforms since 1830, in favor of emancipation. Scholarly consensus suggests von Scholten's views were influenced by his free-colored mistress Anna Heegaard.

King Christian VIII supported the gradual abolition of slavery and ruled in 1847 that every child born of an unfree woman should be free from birth, and that slavery would end entirely after 12 years. That ruling satisfied neither the slaves nor the plantation owners.

Meanwhile, on 27 April 1848, France signed a law to abolish slavery in their colonies within two months, but a slave insurrection on Martinique led to immediate abolition on Martinique on 22 May and Guadeloupe on 27 May.

The slaves in the Danish West Indies did not want to wait for their freedom, either. On 2 July 1848, freedman John Gottlieb (also known as "Moses Gottlieb" or "General Buddhoe") and Admiral Martin King (among others) led a slave rebellion, taking over Frederiksted, Saint Croix. That evening, hundreds of slaves gathered peaceably outside Fort Frederik refusing to work the next day and demanding freedom. By 10 a.m. the following morning, about 8,000 slaves had joined.

On the afternoon of 3 July 1848 (now known as Emancipation Day), Peter von Scholten, in order to end the rebellion and prevent bloodshed and damages, went to Frederiksted and announced an immediate and total emancipation of all slaves. He then went to Christiansted, where a second rebellion had formed and some fires had been set, and had notices disseminated to the other islands. General Buddhoe worked with the governor and other officials to end the riots and violence that had broken out on a few estates.

In the aftermath, Buddhoe is said to have been jailed and exiled to Trinidad. Governor von Scholten also fared poorly. As governor, he did not actually have the authority to end slavery, but had found himself in a situation where he needed to take immediate action that could not wait for communicating with Denmark. For his actions, he was called back to Denmark to face a trial for treason. He was first denied his pension, but later cleared of the charges.

When Denmark abolished slavery in 1848, many plantation owners wanted full reimbursement on the grounds that their assets were damaged by the loss of the slaves, and by the fact that they would have to pay for labor in the future. The Danish government paid fifty dollars for every slave the plantation owners had owned and recognized that the slaves' release had caused a financial loss for the owners.

Post-slavery
The lives of the formerly enslaved people changed very little because many continued to be bound to the plantation system through contractual servitude. Most were bound to serve the plantations where they had previously been enslaved. As employees, former slaves were not the plantation owners' responsibility and did not receive food or care from their employers. As part of a sharecropping system, some formerly enslaved people received a small hut, a little land, and some money; however, this one-time compensation did not change the harsh working conditions.

The Fireburn labor riot, considered to be the largest labor revolt in Danish colonial history, took place on October 1, 1878. The revolt began because the formerly enslaved continued to live and work in slave-like conditions even though three decades had passed since the abolition of slavery. Mary Leticia Thomas, today referred to as Queen Mary of St. Croix, spearheaded the revolt alongside three other women: Axeline ‘Agnes’ Elizabeth Salomon, Matilde McBean and Susanna ‘Bottom Belly’ Abrahamsson. The Fireburn uprising and its leaders continue to have a meaningful role in St. Croix.

2017 marked the 100th anniversary of the sale of the colony by Denmark to the United States. With this centennial, conversations on the legacy of Danish–Norwegian colonization and slavery were reignited in the Scandinavian mainstream. For example, the artists Jeannette Ehlers and La Vaughn Belle unveiled Denmark's first statue of a black woman, I Am Queen Mary, to memorialize Denmark's colonial impact.

title: Danish West Indies