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
eiserne särge u boats german submarines german u boats uboat u boat u boot german submarine german u boat unterseeboot
u boats
WikipediaEntity
U-boats