In response to a United States Army Air Corps light bomber requirement issued in 1938, the Glenn L. Martin Company produced its Model 167, which was given the official designation XA-22. Martin's design was a twin-engine all-metal monoplane, capable of around 310 mph (500 km/h) with a crew of three. The XA-22 was not adopted for operational service in the U.S., as the contract was won by the Douglas DB-7, which became the A-20 Havoc, but Martin received foreign orders, and about 450 of these fast, twin-engined bombers were built.