Numerous future members and leaders of the Nazi Party had served in the Freikorps , including Ernst Röhm , future head of the Sturmabteilung , or SA , Heinrich Himmler , future head of the Schutzstaffel , or SS , and Rudolf Höß , the future Kommandant of the Auschwitz concentration camp .
Many people who would join this party had been in the Freikorps , including Ernst Röhm , future leader of the Sturmabteilung , or SA , and Rudolf Höß , the future Commander of the Auschwitz concentration camp .