Date/Time and Location

The US Air Force branch was formed on September 18, 1947 with the signing of the National Security Act by President Truman. The military had already established a series of designations prior to the official branch being formed and had purchased its first aircraft in 1909, but the 1947 Act established Air Force as an independent service, equal to the Army and Navy.

Learn more about the US Air Force birthday at the Museum of the American G.I. website