The 336th Fighter Squadron (336 FS) is a United States Air Force unit. It is assigned to the 4th Operations Group and stationed at Seymour Johnson Air Force Base, North Carolina. The 336th was constituted on 22 August 1942 as an incorporation of the Royal Air Force 133 Squadron into the United States Army Air Forces' VIII Fighter Command. 133 Squadron was one of three RAF Eagle Squadrons composed of American volunteer pilots who enlisted in the RAF and fought in World War II prior to the United States entry into the war.