What is the highest rank in the United States military air force army marines navy and coast guard?

Omar Bradley, Five star general; General of the Army, which is the highest Army rank in the US Army. George W. Bush, Commander-in-Chief of the United States Armed Forces George Washington and General John "Blackjack" Pershing were named as the only Six star generals in U.S. History. This title is "General of the Armies of the United States." There are only a small number of five stars (General of War). The only person to ever receive this rank twice was Air Force General Henry "Hap" Arnold. Omar Bradley was the last living individual to hold the five star rank until his death in 1981. Overall the rank of 5 Star has been held by Four Army Generals, Four Navy Admirals, and the aforementioned Hap Arnold.