Major general (United States) held by the commandant was raised to major general. It remained the highest rank in the Marine Corps until January 20, 1942, when the rank held by the commandant was raised to lieutenant general. Given that the U.S. Air Force evolved from its predecessors, the U.S. Army Air Service, the U.S. Army Air Corps and the U.S. Army Air Forces, the rank of major general in the Air Force coincides with its establishment as an independent service in 1947. Major general (United States) In the United States Army, United States Marine Corps, and United States Air Force, major general is
General of the Armies "six-star general" and "general of the armies". When MacArthur died in 1964, proponents for his promotion petitioned both the Army and Congress to grant a posthumous promotion to General of the Armies, and even went so far as to obtain a vote of neutral support from Harry S. Truman (meaning he would neither support nor attempt to scuttle the promotion). In 1965, the Deputy Chief of Staff for Army Personnel contacted the Institute of Heraldry and requested the feasibility of creating a six star general insignia in the event that MacArthur was in fact posthumously promoted. At the same time,