Between 1921 and 1923, considered the earliest time period that the Nazi Party existed, there were no titles or ranks used by the regular Nazi Party members although several members choose to wear World War I uniforms at party meetings. When Adolf Hitler replaced Anton Drexler as the leader of the Nazi Party, Hitler began calling himself by the title of Führer (Leader), thus establishing the first formal Nazi Party titles. A position of Deputy Führer (Stellvertreter des Führers), held by Rudolf Hess was created shortly thereafter, as well as a few administrative titles such as Party Secretary and Party Treasurer, which had become formal titles by the time of the abortive Beer Hall Putsch in November 1923.