The first of the DB-7/A-20 Boston/Havoc twin-engine, medium-attack bombers, the DB-7As, were ordered for service in France in 1939 at the beginning of World War II. Because France fell before they could be delivered, they were sent to England, where they were called “Bostons,” along with all later versions that served in Great Britain. In U.S. service the DB-7 was called the A-20 Havoc and more than 7,400 were built in the entire series. With a top speed of more than 320 mph, the three-crew DB-7/A-20 Boston/Havoc was powered by two 1,600-horsepower engines and was armed with a 2,000-pound bomb load and nine machine guns.