The AT-6 TEXAN is a single-engine advanced trainer aircraft used to train pilots of the U.S. Army Air Forces, the U.S. Navy, the British Royal Air Force (RAF), the Royal Canadian Air Force (RCAF), and others during World War II and continuing into the 1970s.

The aircraft has several designations depending on the model and military services. The U.S. Army Air Force designated it the AT-6, the U.S. Navy the SNJ, and British/Commonwealth forces called it the Harvard. In 1962, the U.S. Air Force and Navy changed their designation from AT-6 to T-6.

Built by North American Aviation, the prototype flew in 1935. While designed as a trainer, many AT-6s were repurposed for combat roles and served as fighters in various air forces. T-6s saw service in Korea and Vietnam as forward control aircraft.

The CAF WASP Squadron operates Nella, the AT-6 that tours with the AirPower History Tour. Nella is named after "Fifinella," the Women Airforce Service Pilots (WASP) mascot. Nella was used to train WASP at Avenger Field in Sweetwater, Texas. WASP flew Nella for training classes from 1943 until December 1944. She was the final check ride airplane for several WASP to receive their silver wings.

The AT-6 was more maneuverable and easier to handle, but not as fast as a fighter. The aircraft was designed to provide the best training in all fighter tactics, from ground missions to aerial combat. AT-6s could perform various maneuvers as a "pilot's airplane," including rolls, Immelmann turns, loops, spins, snaps, and vertical rolls.