When did Austria split?
Allied-occupied Austria
In the immediate aftermath of World War II, Austria was divided into four occupation zones and jointly occupied by the United States, the Soviet Union, the United Kingdom, and France. Vienna was similarly subdivided but the central district was collectively administered by the Allied Control Council.
Austria
Following a referendum in 1994, at which consent reached a majority of two-thirds, the country became a member of the European Union on 1 January 1995.