United States Army Logo — The United States Army (in English : United States Army , abbreviated U.S. Army ) is the largest branch of the Armed Forces of the United States . His principal responsibility for military operations on land. In 2009 consisted of 549,015 soldiers on active duty, 358,391 in the Army National Guard ( Army National Guard ) and 205,297 in the Army Reserve U.S. ( United States Army Reserve ).
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The Army has its origin in the Continental Army ( Continental Army ), which was created on June 14th of 1775 , before the establishment of the United States to fight in the War of Independence . After the war and the dismantling of the Continental Army, on June 3rd of 1784 the Congress created the United States Army. Despite this, the Army is considered an evolution of the Continental Army and to account for its origin in 1775 . More