United States Air Force (creator) Alternate names: USAF The United States Air Force, also known as USAF, was established on August 1st, 1947, as part of the United States Army. The United States Air Force is one of seven American uniformed services that specializes in aerial and space warfare. On September 18th, 1947, the United States Air Force was formed as a separate branch of the United States Armed Forces under the Nation Security Act of 1947.Old Collection (donor)