The Schutzmannschaften had a reputation for their auxiliary police battalions (Schutzmannschaft-Bataillonen). Created to support the German offensive, in particular by combating the anti-Nazi resistance, many of these battalions participated in the Holocaust and caused thousands of Jewish deaths. Usually the battalions were voluntary units and were not directly involved in combat. In total, about 200 battalions were formed.[7] Each battalion had an authorized strength of about 500, but the actual size varied greatly. They should not be confused with native German police battalions (SS-Polizei-Bataillone) which the Order Police formed between 1939 and 1945 and which also participated in the Holocaust (see Ordnungspolizei Police Battalions and Reserve Police Battalion 101).[8]