The North American F-86 Sabre, sometimes called the Sabrejet, was a transonic jet fighter aircraft. Produced by North American Aviation, the Sabre is best known as the United States' first swept wing fighter. The F-86 Sabre made its initial flight Ocober 1, 1947. On September 15, 1948, an F-86A set a then-world speed record of 670.9 mph. As a day fighter, the airplane saw service in Korea in three successive series (F-86A, E, and F) where it engaged the Russian-built MiG-15. By the end of hostilities, it had shot down 792 MiGs at a loss of only 76 Sabres, a victory ratio of 10 to 1. The Sabre was by far the most-produced Western jet fighter, with total production of all variants at 9,860 units.