Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online.Cannon. History of cannon, Cannon in the Middle Ages, Naval artillery in the Age of Sail, Field artillery in the American Civil War, Canon obusier de 12, Artillery, Cannon operation, Quaker Gun, Hand cannon, English cannon, Bombard (weapon), Oerlikon 20 mm cannon, Hispano- Suiza HS. 404, MG FF cannon