Original: Numerous future members and leaders of the Nazi Party had served in the Freikorps, including Ernst Röhm, future head of the Sturmabteilung, or SA, and Rudolf Höß, the future Kommandant of the Auschwitz concentration camp.
Simplified: 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.