The P-51 Mustang destroyed more enemy aircraft than any other fighter in Europe. It began as the NA-73 in 1940 at Britain's request. The design showed promise and the Army Air Forces purchase of Allison-powered Mustangs began in 1941 primarily for photo reconnaissance and ground support use due to its limited high-altitude performance.

Herman Goering  stated when he first saw Mustangs  escorting the Heavy Bombers over Berlin, he knew the war was lost for Germany.