Following the establishment of the United States Air Force in 1947, the Air Force rank of General of the Air Force was established as an equivalent to the Army rank of General of the Army. The insignia for General of the Army and General of the Air Force were originally the same. The insignia for General of the Air Force was slightly modified in the 1950s for wear on the new blue Air Force dress uniform. General of the Air Force, however, has never been worn by an officer of the modern Air Force on active duty.