The real power rested with the administration 's Military Commanders , who controlled both the German armed forces and Serb collaborationist forces . In 1941 , the administration 's Military Commander , Franz Böhme , responded to guerrilla attacks on German forces by carrying out the German policy towards partisans that 100 people would be killed for each German killed and 50 people killed for each wounded German . The first set of reprisals were the massacres in Kragujevac and in Kraljevo by the Wehrmacht . These proved to be counterproductive to the German forces in the aftermath , as it ruined any possibility of gaining any substantial numbers of Serbs to support the collaborationist regime of Nedić . Additionally , it was discovered that in Kraljevo , a Serbian workforce group which was building airplanes for the Axis forces had been among the victims . The massacres caused Nedić to urge that the arbitrary shooting of Serbs be stopped , Böhme agreed and ordered a halt to the executions until further notice
Kragujevac
Kragujevac massacre
Territory of the Military Commander in Serbia