The United States Army Air Corps (USAAC) was a forerunner of the United
States Air Force. Renamed by Congress from the Air Service, it was part of
the U.S. Army and the predecessor of the U.S. Army Air Forces (USAAF),
established in 1941. Although abolished as an organization in 1942,
the Air Corps (AC) remained as a branch of the Army until 1947.