The A-20B received the first really large order from the Army Air Corps: 999 aircraft. These resembled the DB-7A rather than the DB-7B, with light armor and stepped rather than slanted glazing in their noses. In practice, 665 of these were exported to the Soviet Union, so only about one-third of them few served with the USAAF.
Vier uitvoeringen mogelijk;
- Boston III, RAF, Unknown unit - Tunisia 1943.
- Boston III, RAF, nr.226 Squadron, Swanton Morley, April 1942.
- Boston III, Free French Air Force, nr.342 "Lorraine" Squadron, 1944.
- A-20B, USAAF - 47th BG, 12th Air Force, Youks-les Baines (Algeria), Februari 1943.
- Lengte 300 mm