The British were unaware that ONS.5’s route was already known to German intelligence, who had successfully intercepted their communications. At the height of his powers, and now, finally, with a sufficient number of U-boats to deploy his wolfpack strategy to its fullest, Grand Admiral Doenitz was poised for battle. In the days that followed, he would dispatch the greatest wolfpack ever assembled to attack a single convoy, one that would eventually consist of five times as many U-boats as escort ships. The odds against survival were great; ignorance may not have been bliss, but it at least
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