Austria
The status of South Tyrol was a lingering problem between Austria and Italy until it was officially settled by the 1980s with a great degree of autonomy being granted to it by the Italian national government. Between 1918 and 1919, Austria was known as the State of German Austria (). Not only did the Entente powers forbid German Austria to unite with Germany, but they also rejected the name German Austria in the peace treaty to be signed; it was, therefore, changed to Republic of Austria in late 1919.
Treaty of Saint-Germain-en-Laye (1919)
With the Armistice of Villa Giusti on 3 November 1918, the fate of the Austro-Hungarian Monarchy was sealed. On 11 November 1918 Emperor Charles I of Austria officially declared to "relinquish every participation in the administration", one day later the provisional assembly declared German-Austria a democratic republic and part of the German Republic. However, on the territory of the Cisleithanian ("Austrian") half of the former empire, the newly established states of Czechoslovakia, Poland, and the Yugoslav Kingdom of Serbs, Croats and Slovenes (the "successor states") had been proclaimed. Moreover, South Tyrol and Trentino were occupied by Italian forces and Yugoslav troops entered the former Duchy of Carinthia, leading to violent fights.