Title: First U-boat Flotilla
Subjects: World War, 1939-1945, Submarine, Germany, Germany. Kriegsmarine, Naval operations, German Naval operations, Submarine forces, History, World war, 1939-1945, naval operations, german, World war, 1939-1945, naval operations, submarine, Guerre mondiale, 1939-1945, Opérations navales allemandes, Opérations sous-marines, HISTORY, Western, Naval Military operations, German
Time periods: 20th century