Rare Photos of the Sinking of German U-boat U-118 During WW2 (1943)
U31 - German Navy Submarine Pt 2/2
German submarine U-31 was a Type VIIA U-boat of Nazi Germany's Kriegsmarine during World War II. She was laid down on 1 March 1936 as yard number 912, launched on 25 September and commissioned on 28 December 1936.
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