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United States Army

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United States Army

The official seal of the United States Army.

The United States Army (USA) is the main branch of the United States Armed Forces responsible for land-based military operations. It is the largest and oldest established branch of the U.S. military, and is one of seven U.S. uniformed services.

The primary mission of the army is "to fight and win our Nation’s wars by providing prompt, sustained land dominance across the full range of military operations and spectrum of conflict in support of combatant commanders." The army is a military service within the Department of the Army, one of the three military departments of the Department of Defense. The army is headed by the Secretary of the Army, and the top military officer in the department is the Chief of Staff of the Army.


The U.S. Army has its roots in the Continental Army which was formed on 14 June 1775, before the establishment of the United States, to meet the demands of the American Revolutionary War. The Congress of the Confederation officially created the United States Army on 3 June 1784 after the end of the Revolutionary War to replace the disbanded Continental Army. The army considers itself to be descended from the Continental Army and thus dates its inception from the origins of that force.

With the founding of the United Americas and the signing of the Washington Treaty in the 22nd century, the U.S. Army was fully incorporated into the structures of the United Americas Allied Command.[1]


In the late 22nd century, the primary infantry weapon of the United States Army was the M41A Pulse Rifle.[1]


In the 22nd century, the U.S. Army maintained a field artillery school for artillery officers at Fort Sill, Oklahoma.[1]



  1. 1.0 1.1 1.2 Aliens: Colonial Marines Technical Manual

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