Austria
The Treaty of Saint-Germain of 1919 (for Hungary the Treaty of Trianon of 1920) confirmed and consolidated the new order of Central Europe which to a great extent had been established in November 1918, creating new states and altering others. The German-speaking parts of Austria which had been part of Austria-Hungary were reduced to a rump state named The Republic of German-Austria (German: "Republik Deutschösterreich"). The desire for "Anschluss" (annexation of Austria to Germany) was a popular opinion shared by all social circles in both Austria and Germany. On 12 November, German-Austria was declared a republic, and named Social Democrat Karl Renner as provisional chancellor. On the same day it drafted a provisional constitution that stated that "German-Austria is a democratic republic" (Article 1) and "German-Austria is an integral part of the German reich" (Article 2). The Treaty of Saint Germain and the Treaty of Versailles explicitly forbid union between Austria and Germany. The treaties also forced German-Austria to rename itself as "Republic of Austria" which consequently led to the first Austrian Republic.
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.