field army

A Field Army, usually referred to simply as an Army, is a term used by many national military forces for a formation superior to a corps and beneath an army group.A Field Army is composed of a headquarters, and usually controls at least two corps, beneath which are a variable number of divisions. A battle is influenced at the Field Army level by transferring divisions and reinforcements from one corps to another to increase the pressure on the enemy at a critical point. Armies are controlled by a General or Lieutenant General.
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