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.
Austria
Much like Germany, Austria was divided into American, British, French, and Soviet zones and governed by the Allied Commission for Austria. As forecast in the Moscow Declaration in 1943, a subtle difference was seen in the treatment of Austria by the Allies. The Austrian government, consisting of Social Democrats, Conservatives, and Communists (until 1947), and residing in Vienna, which was surrounded by the Soviet zone, was recognised by the Western Allies in October 1945 after some doubts that Renner could be Stalin's puppet. Thus, the creation of a separate Western Austrian government and the division of the country was avoidable. Austria, in general, was treated as though it had been originally invaded by Germany and liberated by the Allies.