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.
Austrians
After Austria was excluded from Germany in 1866, the following year Austria joined Hungary as a dual empire known as the Austro-Hungarian Empire. A further major change resulted from a reorganisation of the Austrian Empire in 1867 into a dual monarchy, acknowledging the Kingdom of Hungary as an independent state bound to the remaining part of the empire, as well independent, by a personal and real union, the Emperor of Austria being the Apostolic King of Hungary (with both titles on the same level). The Austrian half, a patchwork of crown-lands, broadly coterminous with the modern-day Austria, the Czech Republic, Slovenia, and parts of Poland, Ukraine, Italy, and Croatia, was bound together by the common constitution of 1867, stating that all subjects now would carry "uniform Austrian citizenship" and have the same fundamental rights. These non-Hungarian lands were not officially called the Austrian Empire. Until 1915, they were officially called "the Kingdoms and States Represented in the Imperial Council" and politicians used the technical term Cisleithania (labelling the Hungarian lands as Transleithania). The general public called them Austria, and in 1915, the non-parliamentary Cisleithanian government decreed to use this term officially, too.