Science Fair Project Encyclopedia
An army is a country's military. The word army (armée in French) can refer to any armed force (for example, the People's Liberation Army of China consists of ground force, navy and air force branches).
National land forces
Most (but not all) armed forces make considerable distinction between the land-based army, the sea-based navy, and the air-based air force, often maintaining three independent organizations. Many air forces were formerly part of an army; historically, the United States Air Force originated as part of the United States Army.
See also: Category:Armies.
An army is also be a large military organization (formation) comprising two or more corps. A particular army is named or numbered to distinguish it from military land forces in general—for example, The U.S. First Army and The Army of Northern Virginia. In the British Army it is normal to spell out the ordinal number of an army (e.g. First Army), whereas lower formations use figures (e.g. 1st Division).
In the Soviet Red Army, "armies" were actually corps-sized formations, subordinate to an army-sized "front" in wartime. In peacetime a Soviet army was usually subordinate to a military district. See Army (Soviet Army).
For the hierarchy of land force organizations, see military organization.
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