allocated a staff, divided into military and administrative branches, and he was allocated personnel to form four area commands and about ten district commands, which reported to the chief of the administrative staff, and the military staff allocated the troops of the four local defence battalions across the area commands. The first military commander in the occupied territory was General der Flieger Helmuth Förster, a Luftwaffe officer, appointed on 20 April 1941, assisted by the chief of the administrative staff, SS-Brigadeführer and State Councillor, Dr. Harald Turner. A further key figure in the initial German administration was SS-Standartenführer Wilhelm Fuchs, who commanded Einsatzgruppe Serbia, which was a grouping that included various detachments of the Reich Security Main Office (, RSHA), including Gestapo (Secret State Police), Kriminalpolizei (Criminal Police, or Kripo), and Ausland-Sicherheitsdienst (Foreign Security Service, or Ausland-SD). Einsatzgruppe Serbien also controlled the 64th Reserve Police Battalion. While he was formally responsible to Turner, Fuchs reported directly to his superiors at the RSHA in Berlin. Collaborationist puppet regime The Germans began a search for a suitable Serb to lead a collaborationist regime in the occupied territory. Consideration was given to appointing Belgrade police chief Dragomir Jovanović, but the German Military Commander in Serbia selected former Yugoslav Minister of Internal Affairs Milan Aćimović. Aćimović formed his Commissioner Government () on 30 May 1941, consisting of ten commissioners. Aćimović was virulently anti-communist and had been in contact with the German police before the war. Upon capturing Belgrade, the Germans ordered the city's 12,000 Jews to report themselves to the occupational authorities, and 9,145 did so. Jews were removed from all official posts by 14 May, and a series of anti-Jewish laws were passed prohibiting them from activities ranging from going to restaurants to riding streetcars. Establishment The earliest written reference to the establishment of a concentration camp for communists and others considered "dangerous to public order" within Belgrade itself was a 26 May 1941 report of the Serbian Gendarmerie Command, which indicated that such a camp was being considered. In the same month, an order from Aćimović's Ministry of Internal Affairs (, MUP) also mentioned a plan to establish a concentration camp to hold known communists and other persons. Following the invasion and defeat of Yugoslavia, the Communist Party of Yugoslavia had begun organising for an armed struggle against the occupiers and their local collaborators. On 19 June, the MUP held a conference