What were German submarines called in WWII?
U-boats U-Boats U boats Uboat U boat Unterseeboot U-Boot Eiserne Särge German submarine U Boat German submarines U boot U-boat German U-boat U-Boat German U-boats
german submarines u boot uboat u boat u boats unterseeboot german submarine eiserne särge german u boats german u boat
u boats
WikipediaEntity
U-boats