army in March 1920 and began working full-time for the Nazi Party. In 1920, a small "hall protection" squad was organised around Emil Maurice. The group was first named the "Order troops" (Ordnertruppen). Later in August 1921, Hitler redefined the group, which became known as the "Gymnastic and Sports Division" of the party (Turn- und Sportabteilung). By the autumn of 1921 the group was being called the Sturmabteilung ("Storm Detachment") or SA, and by November 1921 the group was officially known by that name. Also in 1920, Hitler began to lecture in Munich beer halls, particularly the Hofbräuhaus, Sterneckerbräu and Bürgerbräukeller. Only Hitler was able to bring in the crowds for the party speeches and meetings. By this time, the police were already monitoring the speeches, and their own surviving records reveal that Hitler delivered lectures with titles such as Political Phenomenon, Jews and the Treaty of Versailles. At the end of the year, party membership was recorded at 2,000. In June 1921, while Hitler and Dietrich Eckart were on a fundraising trip to Berlin, a mutiny broke out within the Nazi Party in Munich, its organizational home. Members of its executive committee wanted to merge with the rival German Socialist Party (DSP). Hitler returned to Munich on 11 July and angrily tendered his resignation. The committee members realised that the resignation of their leading public figure and speaker would mean the end of the party. Hitler announced he would rejoin on the condition that he would replace Drexler as party chairman and that the party headquarters would remain in Munich. The committee agreed, and he rejoined the party on 26 July as member 3,680. In the following days, Hitler spoke to several packed houses and defended himself, to thunderous applause. His strategy proved successful: at a general membership meeting, he was granted absolute powers as party chairman, with only one nay vote cast. On 14 September 1921, Hitler and a substantial number of SA members and other Nazi Party adherents disrupted a meeting of the Bavarian League at the Löwenbräukeller. This federalist organization objected to the centralism of the Weimar Constitution but accepted its social program. The League was led by Otto Ballerstedt, an engineer whom Hitler regarded as "my most dangerous opponent". One Nazi, Hermann Esser, climbed upon a chair and shouted that the Jews were to blame for the misfortunes of Bavaria and the Nazis shouted demands