Germany U Boat Submarine Sailing World War 2 Real Photo Postcard

German U-boats (Unterseeboote) formed the spearhead of the Kriegsmarine's campaign during World War II, predominantly engaging in the Battle of the Atlantic to cripple Allied shipping lanes. These vessels, likely Type VII or Type IX, were instrumental in Germany's naval strategy, employing their diesel-electric propulsion and torpedo capabilities to conduct wolfpack attacks against convoys transporting vital supplies across the ocean.