Assassination of Hitler In summer 1942, Colonel Henning von Tresckow, Colonel Claus von Stauffenberg, and General Adolf Heusinger asked Colonel Gehlen to participate in their assassination of Adolf Hitler [REF].
Post-War future During the German war against Soviet Russia (1941-45), Gen. Gehlen's FHO collected much tactical military-intelligence about the Red Army, and much strategic, political-intelligence about Stalin's Russia.