 Complete the following phrase:  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 