The Curtiss P-40 Warhawk was an all metal, single-engine, single-seat fighter and ground-attack aircraft that made its maiden flight in 1938. Since the P-40 was a modified P-36 Hawk it was developed quickly and entered service in record time. The USAAF referred to the aircraft as the Warhawk while the British Commonwealth and the Soviet Union called the B and C variants Tomahawk while the D and later variants were called Kittyhawk. By the end of production in 1944 approximately 18,000 aircraft were manufactured.