The Boeing B-29 Superfortress entered combat less than two years after its first flight in 1942. It was the largest bomber to go into production during WW II and had the longest range. In February 1942, the Army Air Forces ordered the B-29 built at factories around the country, including Bell Aircraft Co. at Marietta, Ga., North American Aviation at its Kansas City, Kan., plant, and the Glenn Martin Co. in Omaha, Neb. This ordering of a pre-production airplane industrywide was unprecedented in aviation history. By the time production terminated in 1946, 3,970 B-29s were built, 2,766 at Boeing facilities.