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 also drastically reduced in size and there was no practical need for a superior General rank, thus the proposal for General of the Armies was soon forgotten. In 1865, after the close of the American Civil War, Congress again revisited the idea of a superior General rank. The result was the creation of a special rank called "General of the Army of the United States", which was held by Ulysses S. Grant. This early version of General of the Army was in fact a four-star general officer rank although, unlike in modern times, Congress intended for only one Army officer