At the end of 1943 the SS and the Gestapo arrested several prominent Germans involved in plotting to overthrow Adolf Hitler, including Dietrich Bonhoffer, Klaus Bonhoffer, Josef Muller and Hans Dohnanyi. Others under suspicion, such as Wilhelm Canaris and Hans Oster, were dismissed from office in January 1944. Major Claus von Stauffenberg emerged as a leader of the group of German Army officers opposed to Nazi rule, and began to plan for the assassination of Adolf Hitler, Hermann Goering and Heinrich Himmler, and for a takeover by the Army. Once these three prominent Nazis had been killed,...