I'm currently reading William Shirer's book entitled Rise and Fall of the Third Reich. I'm at the point where the German High Command realizes he is a threat to Germany's survival and something must be done ( time period 1938.. Hitler is threatening to invade Czechoslovakia).Quoting from Chapter 12 Road to Munich.. pg 372 .. Birth of a Conspiracy Against Hitler. " After five and a half years of National Socialism it was evident to the few Germans who opposed Hitler that only the Army possessed the physical strength to overthrown him. The workers, the middle and upper classes, even if they wanted to, had no means of doing it. They had no organization outside of the Nazi party group and they were , of course, unarmed.