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  2. History of the United States Army - Wikipedia

    en.wikipedia.org/wiki/History_of_the_United...

    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.

  3. United States Army - Wikipedia

    en.wikipedia.org/wiki/United_States_Army

    The United States Army ( USA) is the land service branch of the United States Armed Forces. It is one of the eight U.S. uniformed services, and is designated as the Army of the United States in the U.S. Constitution. [14] The Army is the oldest branch of the U.S. military and the most senior in order of precedence. [15] It has its roots in the Continental Army, which was formed on 14 June 1775 ...

  4. United States Armed Forces - Wikipedia

    en.wikipedia.org/wiki/United_States_armed_forces

    The United States Armed Forces are the military forces of the United States. [13] The armed forces consist of six service branches: the Army, Marine Corps, Navy, Air Force, Space Force, and Coast Guard. [14] [15] All six armed services are among the eight uniformed services of the United States. [16] Each of the different military services is ...

  5. Military history of the United States - Wikipedia

    en.wikipedia.org/wiki/Military_history_of_the...

    As of 2024, the United States Armed Forces consists of the Army, Marine Corps, Navy, Air Force and Space Force, all under the command of the Department of Defense, and the Coast Guard, which is controlled by the Department of Homeland Security .

  6. Structure of the United States Army - Wikipedia

    en.wikipedia.org/wiki/Structure_of_the_United...

    In 1941, the "Army of the United States" was founded to fight World War II. The Regular Army, Army of the United States, the National Guard, and Officer/Enlisted Reserve Corps (ORC and ERC) existed simultaneously. [citation needed]

  7. First Army (United States) - Wikipedia

    en.wikipedia.org/wiki/First_Army_(United_States)

    First Army is the oldest and longest-established field army of the United States Army. [4] It served as a theater army, having seen service in both World War I and World War II, and supplied the US army with soldiers and equipment during the Korean War and the Vietnam War under some of the most famous and distinguished officers of the U.S. Army. It now serves as a mobilization, readiness and ...

  8. History of the United States Air Force - Wikipedia

    en.wikipedia.org/wiki/History_of_the_United...

    The United States Air Force became a separate military service on 18 September 1947 with the implementation of the National Security Act of 1947. [1] [2] The Act created the National Military Establishment, later renamed the United States Department of Defense, which was composed of four of the five branches, the Army, Marine Corps, Navy, and a newly created Air Force. [3] Prior to 1947, the ...

  9. Army of the United States - Wikipedia

    en.wikipedia.org/wiki/Army_of_the_United_States

    The Army of the United States is one of the four major service components of the United States Army (the others being the Regular Army, the United States Army Reserve and the Army National Guard of the United States ), [1] but it has been inactive since the suspension of the draft in 1973 and the U.S. military's transition to a volunteer force. [2] Personnel serving in the United States Army ...