For the Allies, D day was only the beginning. Having succeeded in that epic venture, they faced the prospect of moving beyond the beaches of France.For the Germans who had failed to halt the Allies at the water's edge, the question was how to stop the enemy from further advance before it was too late.Martin Blumenson never forgets that the Allies' spectacular dash from their Normandy beachhead to the German border in the summer of 1944 was accomplished...