Carinthia, East Tyrol, and Styria then formed the UK occupation zone of Allied-administered Austria. The area was witness to the turnover of German-allied Cossacks to the Red Army in 1945. The Allied occupation was terminated in 1955 by the Austrian State Treaty, which restored Austria's sovereignty. The relations between the German- and the Slovene-speaking Carinthians remained somewhat problematic. Divergent views over the implementation of minority protection rights guaranteed by Article 7 of the Austrian State Treaty have created numerous tensions between the two groups in the past fifty years.