German Sailors Drilling With the Deck Gun of a U-boat Docked in a Port During World War 1 (1910's)

German sailors drilling with the deck gun of a U-boat docked in a port during World War 1.

Source: National Archives and Records Administration.

Crewmen in the Engine Room of an Unidentified German U-Boat During World War 1

Crewmen in the engine room of an unidentified German U-boat during World War 1.

Source.

Two German Patrol Boats on Lake Ladoga on the Eastern Front (1942)

Two German patrol boats on Lake Ladoga on the Eastern Front, August 13, 1942.

Source.