Field Marshal von Blomberg , the German Minister at Potsdam ' s greatest military parade since the war , 150 anniversary of Frederick the great ' s death . The veteran Field Marshal von Mackensen , who wore Hussar uniform , and General vo Fritsch , Commander in Chief of the army , were also present . The entire 23 Division took part in the parade , which was the biggest military display Potsdam had seen since the war . Photo shows , Field Marshal von Mackensen talking with Gerneral von Fritsch ( left ) with Field Marshal von Blomberg on right . Behind is Vice Admiral Wilets . 18 August 1936