Hitler is Discharged from the Army and Begins Participating Full-Time in the German Workers' Party (DAP)

Hitler was discharged from the army in March 1920 and with his former superiors' continued encouragement began participating full time in the party's activities. By early 1921, Hitler was becoming highly effective at speaking in front of large crowds. In February, Hitler spoke before a crowd of nearly six thousand in Munich. To publicize the meeting, he sent out two truckloads of party supporters to drive around with swastikas, cause a commotion and throw out leaflets, their first use of this tactic. Hitler gained notoriety outside of the party for his rowdy, polemic speeches against the Treaty of Versailles, rival politicians (including monarchists, nationalists and other non-internationalist socialists) and especially against Marxists and Jews.

http://en.wikipedia.org/wiki/Adolph_hitler