The Lockheed P-38 Lightning was an American twin-engine fighter aircraft used extensively by the United States Army Air Forces (USAAF) during World War II. It was known for its unique twin-boom design and its long range, making it particularly effective in the Pacific theater. It was powered by two Allison V-1710 engines. The Lightning was a versatile aircraft, being used for both air-to-air combat and ground attack missions.