Nazi elite corps (German Schutz-Staffel `protective squadron') established 1925. Under Himmler its 500,000 membership included the full-time Waffen-SS (armed SS), which fought in World War II, and spare-time members. The SS performed state police duties and was brutal in its treatment of the Jews and others in the concentration camps and occupied territories. It was condemned at the Nuremberg Trials of war criminals.