The non-German ethnic groups broke away leaving Austria's current boundaries as German Austria, which was proclaimed an independent republic. The severe global economic crisis coupled with domestic political tensions led to civil strife in February 1934, with the May Constitution of 1934 resulting in an authoritarian corporate state. Just two months later the Austrian Nazis staged the July coup, wanting to annex the country to the German Third Reich, resulting in the assassination of Chancellor Engelbert Dollfuss. While the coup failed, Adolf Hitler succeeded in annexing Austria on 12 March 1938 as "Ostmark", until 1945. Austria was divided into four occupation zones after the Second World War and then in 1955 became the independent sovereign state (Second Republic) that has existed to the present day. In 1995, Austria joined the European Union.