Logistical support for these police units was frequently supplied by the local military commanders, which helped the GFP facilitate the process of transporting civilian prisoners "to places where they could be murdered."[4] Original jurisdiction between the GFP and the Einsatzgruppen death squads in the Eastern theater was supposed to be clearly delineated and mutually reciprocal, but when the final negotiations about identified areas of responsibility took place in May 1941 between Generalquartiermeister Eduard Wagner and Gestapo chief Heinrich Müller, there was serious disagreement.[5] Due to his expertise in matters of protocol, Walter Schellenberg replaced Müller and subsequently made important changes to the original draft, alterations which allowed the Einsatzgruppen to operate in both the rear areas of the army group and in the corps areas of the front.[6] At the end of May 1941, Wagner and Reinhard Heydrich signed the agreement between the SS and the OKH, sealing the cooperative arrangement between the two organizations.[7]