Foreign U-boats was the title for a special section created by Nazi Germany's Kriegsmarine that adopted 15 captured enemy submarines and a single Turkish vessel into the U-boat corps. Beginning in 1939 and lasting until the end of World War II in 1945, the Kriegsmarine modified a total of 13 captured enemy submarines, then deployed them into combat with German crews. The special corps was not especially successful, as only ten enemy ships were destroyed by Foreign U-boats through the entire war. Eight of these were destroyed by , which was a modified Type IX U-boat originally built for the Turkish Navy. However, some were effective as minelayers.
The captured submarines : ex Turkish submarine Batiray UB: ex British submarine UC-1: ex Norwegian submarine HNoMS B-5 UC-2: ex Norwegian submarine HNoMS B-6 UD-1: ex Dutch submarine UD-2: ex Dutch submarine : ex Dutch submarine HNLMS O 25 : ex Dutch submarine HNLMS O 26 : ex Dutch submarine HNLMS O 27 UF-1: ex UF-2: ex UF-3: ex UIT-22: ex Italian submarine Alpino Bagnolini UIT-23: ex Italian submarine Reginaldo Giuliani UIT-24: ex UIT-25: ex
See also Yanagi missions of the Imperial Japanese Navy in World War II to European waters List of IJN World War II submarines, including non-Japanese submarines in IJN service
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