During and immediately after the Second World War, the United States created four officers with a rank above four-star general, giving them protocol equivalence to British and Soviet field marshals:
It has been suggested that the "marshal" term was not adopted because the Chief of Staff of the Army, George C. Marshall, refused to be designated Marshal Marshall.
Henry "Hap" Arnold was General of the Army Air Force.
Three Fleet Admirals were of equivalent naval rank.