The Ilyushin Il-2 was a ground-attack aircraft produced by the Soviet Union in large numbers during the Second World War. With 36,183 units of the Il-2 produced during the war, and in combination with its successor, the Ilyushin Il-10, a total of 42,330were built, making it the single most produced military aircraft design in aviation history, as well as one of the most produced piloted aircraft in history along with the American postwar civilian Cessna 172 and the Soviet Union's own then contemporary Polikarpov Po-2 Kukuruznik multipurpose biplane. In 1943, the Il-2 Type 3 or Il-2m3 came out with redesigned "arrow-wings" that possessed leading edges that were swept back 15 degrees on the outer panels, and nearly straight trailing edges, resulting in a wing planform somewhat like the AT-6 trainer. Performance and handling were much improved from the resulting shift of the Il-2's aerodynamic center rearwards with the revised "arrow wing" planform to correct the earlier problem, and this became the most common version of the Il-2.