The story of the battleship Tirpitz-Bismarck's sister ship-and the desperateAllied efforts to destroy it . . . After the Royal Navy's bloody high seas campaign to kill the mighty Bismarck, the Allies were left with an uncomfortable truth-the German behemoth had a twin sister. Slightly larger than her sibling, the Tirpitz was equally capable of destroying any other battleship afloat, as well as wreak havoc on Allied troop and supply convoys. For the next three and a half years the Allies launched a variety of attacks to remove Germany's last serious surface threat.