The July 20TH 1944 Plot.
Operation Valkyrie (German: Operation WalkÃ¼re) was an order for the Territorial Reserve Army of Germany to execute and implement in case of a general breakdown in civil order of the nation. Failure of the government to maintain control of civil affairs could be caused by the Allied bombing of German cities, or a rising of millions of foreign forced laborers working in German factories.
German Army (Heer) officers General Friedrich Olbricht, Major General Henning von Tresckow, and Colonel Claus von Stauffenberg modified the plan with the intention of using it to take control of German cities, disarm the SS, and arrest the Nazi leadership once Hitler had been assassinated in the July 20 Plot. Hitler's death (as opposed to his arrest) was required to free German soldiers from their oath of loyalty to him (Reichswehreid). After lengthy preparation, the plot was carried out in 1944, but failed.