The future SA developed by organizing and formalizing the groups of ex-soldiers and beer hall brawlers who were to protect gatherings of the Nazi Party from disruptions from Social Democrats (SPD) and Communists (KPD), and to disrupt meetings of the other political parties. By September 1921 the name Sturmabteilung (SA) was being used informally for the group.[9] Hitler was the official head of the Nazi Party by this time.[10]