The Vought F4U Corsair is an American fighter aircraft that saw service primarily in World War II and the Korean War. The Corsair was designed as a carrier-based aircraft, but it came to and retained prominence in its area of greatest deployment: land based use by the U.S. Marines. Due to logistics issues and initial problems with carrier landings, the role of the dominant U.S. carrier based fighter aircraft was thus filled by the Grumman F6F Hellcat, powered by the same Double Wasp engine first flown on the Corsair's first prototype in 1940. The Corsair also served in the U.S. Navy.