Naval combat played a major role throughout the European Theater of the Second World War. Without constant supply convoys from the United States to Great Britain and the Soviet Union, the Allies could not have defeated Hitler. But those convoys had to be protected from attacks by German U-boats and other warships. In this episode, Sean and James narrate the early years of the naval war around Europe, including the epic story of the search for and destruction of the massive German battleship Bismarck.