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U Boat Pens at St. Nazaire and Lorient - World War Two Cemeteries - A photographic guide to the cemeteries and memorials of WW2
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Second World War U-boat pen in Keroman III bunker, Lorient submarine base, France Stock Photo - Alamy
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Ahoy - Mac's Web Log - The U-Boats pens in the Bay Of Biscay ports. Built after France collapses in June of 1940
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