Along with other collaborationist military and paramilitary units , the SDS was used against the Partisans operating within the occupied territory . In late 1941 , prior to the formation of the SDS , the Serbian gendarmerie had participated in the German-led Operation Uzice , which drove the Partisans and Chetniks from the Užice area . The SDS routinely executed captured Partisans , and frequently took and murdered hostages in towns and villages . The SDS also included former members of the gendarmerie that had assisted German troops to round up hostages to be shot at both Kraljevo and Kragujevac in October 1941 . In July 1941 , the Banjica concentration camp had been established in the suburbs of Belgrade . It was initially guarded by both the Gestapo and the SDS , but sole responsibility was eventually transferred to the SDS , who behaved sadistically and violently towards the inmates . Survivors of the camp stated that executions at the camp were carried out by both the Belgrade Special Police and the SDS , and that those executed included children . A total of 3,849 people were killed at the camp before it was closed on 3 October 1944 . The SDS became increasingly unpopular with the population as time went on . Despite their limited independence , the SDS actively engaged in dehumanising Jews , Roma and communist Serbs , and in killing people from those groups or delivering them to the Germans for execution . They engaged in the execution of hostages both under Gestapo or Wehrmacht control and at their own initiative . The SDS clashed with other collaborationist formations at times , specifically Dimitrije Ljotić 's Serbian Volunteer Corps ( '' Srpski dobrovoljački korpus '' or SDK ) , and the Pećanac Chetniks loyal to '' vojvoda '' Kosta Pećanac
Kragujevac
Kragujevac massacre
Serbian State Guard