with some imagination, why shouldnt the US have sent a sub to France? British subs did operate close to thew german ports (see Wolfgang Hirschfelds Diary of a U-Boat).
It did not sink? I have sunk some German subs (testing purposes with GWX 1.2) and it worked perfectly. don't see why there should be a prob with 2.0. One torpedo was not enough maybe, these US boats were pretty large compared to German / British ones.
P.S. Comments about GWX ignored. Personally I would rejoice if I encountered an US sub, because it spices up the game.
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