<Ul> <Li> Aeronautical Division , Signal Corps 1 August 1907 -- 18 July 1914 </Li> <Li> Aviation Section , Signal Corps 18 July 1914 -- 20 May 1918 </Li> <Li> Division of Military Aeronautics 20 May 1918 -- 24 May 1918 </Li> <Li> Air Service , U.S. Army 24 May 1918 -- 2 July 1926 </Li> <Li> U.S. Army Air Corps 2 July 1926 -- 20 June 1941 * </Li> <Li> U.S. Army Air Forces 20 June 1941 -- 18 September 1947 * </Li> <Li> United States Air Force 18 September 1947 -- present </Li> </Ul>
<Ul> <Li> Aeronautical Division , Signal Corps 1 August 1907 -- 18 July 1914 </Li> <Li> Aviation Section , Signal Corps 18 July 1914 -- 20 May 1918 </Li> <Li> Division of Military Aeronautics 20 May 1918 -- 24 May 1918 </Li> <Li> Air Service , U.S. Army 24 May 1918 -- 2 July 1926 </Li> <Li> U.S. Army Air Corps 2 July 1926 -- 20 June 1941 * </Li> <Li> U.S. Army Air Forces 20 June 1941 -- 18 September 1947 * </Li> <Li> United States Air Force 18 September 1947 -- present </Li> </Ul>
when did the us army air corps become the us air force
when did the us army air corps become the us air force
18 September 1947
18 September 1947