Title: The Defeat of the enemy attack on shipping, 1939-1945
Subjects: Submarine, World War, 1939-1945, British Naval operations, Naval operations, German Naval operations, Shipping, History, World war, 1939-1945, naval operations, submarine, World war, 1939-1945, naval operations, german, World war, 1939-1945, naval operations, british, Shipping, history
Places: North Atlantic Ocean
Time periods: 20th century