Douglas A-20 Havoc - Wikipedia,Douglas military aircraft Army. The Douglas A-20 (Havoc) light bomber, called the Boston by the British, is used by both the American Air Force and the Royal Air Force. It was designed,AC - Boston,Douglas A-20H-D-01 – 'Cry 'Havoc!', and let slip the dogs of war!' | Shortfinals - aviation and more!,A-20 Havoc | IPMS/USA Reviews