User:White Shadows/German U-boat bases in occupied France
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German U-boat bases in occupied France existed between 1940 and 1944, when the Kriegsmarine (German Navy) converted several naval bases in France into U-boat bases following the surrender of all French armed forces during the Second Armistice at Compiègne. French coastal cities became available to the German Navy after the Battle of France in May–June 1940. U-boats stationed in France were generally used to extend the German Navy's range of operation in the North Atlantic and English Channel. These naval bases were used to house U-boats that would take part in the interception of Allied convoys that crossed the Atlantic Ocean to the United Kingdom.