The Order Police battalions were militarised formations of the German Order Police (uniformed police) during the Nazi era. During World War II, they were subordinated to the SS and deployed in German-occupied areas, specifically the Army Group Rear Areas and territories under German civilian administration. Alongside detachments from the Einsatzgruppen and the Waffen-SS, these units perpetrated mass murder of the Jewish population and were responsible for large-scale crimes against humanity targeting civilian populations.