The U-boat war, 1939-1945

Description:

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

Places: Atlantic Ocean,  Germany

Times: 20th century