The Battle of the Atlantic lasted as long as World War Two itself. By the summer of 1942 one Allied ship was going down every four hours, yet German U-boat losses remained frustratingly low.

Show more World War II’s longest campaign was fought in the Atlantic Ocean. Hitler’s U-boats hunted in packs, chasing down the convoys which were bringing vital supplies to Britain.

In the mid-20th century, when people looked at a map of the world ... that crossed the Atlantic Ocean. At the time, this was ...