Members of the did not have official uniforms, often wearing just an identifying armband and a badge, and were not allowed to carry firearms. They were used by the Germans primarily for securing the deportation of other Jews to the concentration camps. One of the largest police units was to be found in the Warsaw Ghetto, where the Jüdischer Ordnungsdienst numbered about 2500. The Łódź Ghetto had about 1200, and the Lviv Ghetto 500.