For a few hours on July 20, 1944, Nazi Germany's fate hung on a 32-year-old Wehrmacht major named Otto Ernst Remer. On that day, believing that their plot to kill Hitler had succeeded,* the mutineers occupied the War Ministry in Berlin and flashed the code word Walkure to all Wehrmacht units. On its receipt, commanders throughout Germany were to break open sealed orders directing them to arrest Nazi and SS officials and occupy their headquarters. Germany would at last throw off Naziism.
Much depended on the few hours before the anti-Hitler troops could get to Berlin. Nazi headquarters in Berlin had to...