国家社会主義自動車軍団
Pfeffer set about strengthening and reorganizing the SA. He established seven new regional level SA-"Oberführer" commands in March 1928. In February 1929, their title was changed to OSAF-"Stellvertreter" (Deputy Supreme SA Leader). During his tenure, the SA expanded from around 30,000 to over 60,000. On 1 April 1930, Pfeffer was made "Korpsführer" of the newly established National Socialist Automobile Corps, the forerunner of the National Socialist Motor Corps (NSKK).