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In page 20 July plot:

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On Saturday 1 July 1944 Stauffenberg was appointed Chief of Staff to General Friedrich Fromm at the Reserve Army headquarters on Bendlerstraße in central Berlin. This position enabled Stauffenberg to attend Hitler's military conferences, either at the Wolfsschanze in East Prussia or at Berchtesgaden, and would thus give him an opportunity, perhaps the last that would present itself, to kill Hitler with a bomb or a pistol. Meanwhile, new key allies had been gained. These included General Carl-Heinrich von Stülpnagel, the German military commander in France, who would take control in Paris when Hitler was killed, and it was hoped, negotiate an immediate armistice with the invading Allied armies.[citation needed]