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.
History of Austria
The First World War effectively ended for Austria on 3 November 1918, when the defeated army signed the Armistice of Villa Giusti at Padua following the Battle of Vittorio Veneto. (Technically this applied to Austria-Hungary, but Hungary had withdrawn from the conflict on 31 October 1918, and most other states within the empire, such as Czechoslovakia and the South Slavs, had also done so.) Austria was forced to cede all territory occupied since 1914, plus a considerable amount of other territory, and the allies were given access to Austria. The empire was thus dissolved.