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.
Marburg's Bloody Sunday
The Republic of German Austria was created following the defeat of the Austro-Hungarian Empire in the First World War and claimed areas with a predominantly German-speaking population within the bounds of the former empire. In addition to the current area of the Republic of Austria, these included parts of South Tyrol and the town of Tarvisio, both now in Italy; southern Carinthia and southern Styria, now in Slovenia; and Sudetenland proper and German Bohemia (later also part of Sudetenland), now in the Czech Republic.