Government of Austria commencement of the Austria Constitution on 10 November 1920 became first Federal Chancellor of Austria. Mayr and his successors proceeded with the support of the Christian Social Party and the Greater German nationalists, while the Social Democrats remained in opposition. From 5 March 1933 onwards, the Christian Social chancellor Engelbert Dollfuß continued to rule by suppressing the National Council parliament. In the course of the Austrian Civil War he brought down the opposition, and on 1 May 1934 implemented the authoritarian Federal State of Austria. All political parties were banned, except for the Fatherland's Front supporting Dollfuß' Austrofascist government. The
Austria rapid collapse of the Reich. Karl Renner and Adolf Schärf (Socialist Party of Austria [Social Democrats and Revolutionary Socialists]), Leopold Kunschak (Austria's People's Party [former Christian Social People's Party]), and Johann Koplenig (Communist Party of Austria) declared Austria's secession from the Third Reich by the Declaration of Independence on 27 April 1945 and set up a provisional government in Vienna under state Chancellor Renner the same day, with the approval of the victorious Red Army and backed by Joseph Stalin. (The date is officially named the birthday of the second republic.) At the end of April, most of western and