18 September is the official birthday of the U.S. Air Force, created in 1947 when the U.S. Congress seperated it from the U.S. Army. Prior to that it was known as
U.S. Army Air Forces (1941-47),
U.S. Army Air Corps (1926-41),
U.S. Army Air Service (1918-26), Division of Military Aeronautics (1918), Signal Corps Aviation (1914-18), and Signal Corps Aeronautics (1907-14).
U.S. COAST GUARD, 226 YEARS OLD!