To Great Britain and Germany, the Battle of the Denmark Strait came like a thunderclap in the spring of 1941. The pride of the Royal Navy, HMS Hood, was utterly destroyed, and its newest battleship, Prince of Wales, severely damaged and forced to withdraw. This was at the hands of Germany's huge battleship Bismarck, on its first foray into North Atlantic waters. The blast of heavy shells between the behemoths resonated both in Whitehall and Berlin...