History of Austria
Austria was dominated by the House of Habsburg and House of Habsburg-Lorraine ("Haus Österreich") from 1273 to 1918. In 1808, when Emperor Francis II of Austria dissolved the Holy Roman Empire, Austria became the Austrian Empire, and was also part of the German Confederation until the Austro-Prussian War of 1866. In 1867, Austria formed a dual monarchy with Hungary: the Austro-Hungarian Empire (1867–1918). When this empire collapsed after the end of World War I in 1918, Austria was reduced to the main, mostly German-speaking areas of the empire (its current frontiers), and adopted the name The Republic of German-Austria. However the union and name were forbidden by the Allies at the Treaty of Versailles. This led to the creation of the First Austrian Republic (1918-1933).
Germans
During the 1920s, the constitutions of both the First Austrian Republic and the Weimar Republic included the goal of union between the two countries which was supported by all different political parties. In the early 1930s, before the Nazis seized power, popularity for union between Austria and Germany remained strong and the Austrian government looked at the possibility of a customs union with Germany in 1931 but this was stopped by French opposition. In 1933, after Austrian-born Hitler came to power, support for an "Anschluss" grew. The Austrofascism era of Dollfuss/Schuschnigg between 1934-1938 accepted that Austrians were Germans and that Austria was a "German state" but was strongly opposed to Hitler's desire to annex Austria to the Third Reich and wished for Austria to remain independent.