guilt the world will not forget in a hundred years. This guilt will fall not only on Hitler, Himmler, Göring, and their comrades but on you and me, your wife and mine, your children and mine, that woman crossing the street, and those children over there playing ball. He was likewise incensed by the treatment of Russian prisoners of war, and in particular by the mass shootings of Jewish women and children by the Einsatzgruppen behind the lines. When Tresckow learned about the massacre of thousands of Jews at Borisov, he appealed passionately to Field Marshal Fedor von Bock: "Never may such a thing happen again! And so we must act now. We have the power in Russia!" Army Group Centre staff included Lieutenant Colonel Georg Schulze-Büttger, Colonel Rudolf Christoph Freiherr von Gersdorff, Major Carl-Hans Graf von Hardenberg, Lieutenant Heinrich Graf von Lehndorff-Steinort, Lieutenant Fabian von Schlabrendorff, Lieutenant Philipp Freiherr von Boeselager and his brother Georg Freiherr von Boeselager, Lieutenant Colonel Hans-Alexander von Voss and Lieutenant Colonel Berndt von Kleist among others, many of them from Tresckow's old Infantry Regiment 9. The headquarters of Army Group Centre thus emerged as the new nerve centre of Army resistance. At the end of September 1941, Tresckow sent his special operations officer Schlabrendorff to Berlin to contact opposition groups and declare that the staff of Army Group Centre was "prepared to do anything." This approach, made at the height of German expansion and the nadir of anti-Hitler opposition, represented the first initiative to come from the front and from the Army, as Ulrich von Hassell noted in his diary. Schlabrendorff continued to serve as liaison between Army Group Centre and opposition circle around General Ludwig Beck, Carl Friedrich Goerdeler and Colonel Hans Oster, the deputy head of Abwehr (German military intelligence) who was involved in a 1938 coup attempt against Hitler (Oster Conspiracy). Oster's recruitment of General Friedrich Olbricht, head of the General Army Office headquarters, in 1942 linked this asset to Tresckow's resistance group in Army Group Centre, creating a viable coup apparatus. Plots against Hitler It was decided that Tresckow's group would assassinate Hitler and thereby provide the 'spark' for the coup, which Olbricht would direct from Berlin. In late 1942, Olbricht indicated that he still needed about eight weeks to complete preparations for the coup. Shortly thereafter, Tresckow traveled to Berlin to discuss the few remaining questions and emphasize that