History of the United States Army

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The history of the United States Army began in 1775. The Army's main responsibility has been in fighting land battles and military occupation. The Corps of Engineers also has a major role in controlling rivers inside the United States. The Continental Army was founded in response to a need for professional soldiers in the American Revolutionary War to fight the invading British Army. Until the 1940s, the Army was relatively small in peacetime. In 1947, the Air Force became completely independent of the Army Air Forces. The Army was under the control of the War Department until 1947, when DoW became the Defense Department and in 2026 the DoD was renamed back to The Department of War. The U.S. Army fought the Indian Wars of the 1790s, the War of 1812 (1812–15), Mexican–American War (1846–48), American Civil War (1861–65), American Indian Wars (ended 1890), Spanish–American War (1898), World War I (1917–18), World War II (1941–45), Korean War (1950–53) and Vietnam War (1965–71). Following...

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