Title: The U-boat war, 1939-1945
Subtitle: rare photographs from wartime archives
Subjects: Pictorial works, World War, 1939-1945, History, Germany. Kriegsmarine, Campaigns, Submarine, Submarines (Ships), Germany, Submarine forces, Naval operations, German Naval operations, Enigma cipher system, ULTRA (Intelligence system), Cryptography, Electronic intelligence, Electronic intellegence, Sources, HISTORY, Military, World War II, Naval Military operations, German, Weltkrieg, Unterseebootkrieg, Enigma, Dechiffrierung, Ultra, Warships, World war, 1939-1945, naval operations, german, World war, 1939-1945, naval operations, submarine
Places: Atlantic Ocean, Germany
Time periods: 20th century