Austrians
Historically, Austrians were regarded as ethnic Germans and viewed themselves as such. Austria was part of the Holy Roman Empire and the German Confederation until the Austro-Prussian war in 1866 which resulted in Prussia expelling Austria from the Confederation. Thus, when Germany was founded as a nation-state in 1871, Austria was not a part of it. In 1867, Austria was reformed into the Austro-Hungarian Empire. After the collapse of the Austro-Hungarian Empire in 1918 at the end of World War I, Austria was reduced to a rump state and adopted and briefly used the name the Republic of German-Austria ("Republik Deutschösterreich") in an attempt for union with the Republic of Germany, but was forbidden due to the Treaty of Saint-Germain-en-Laye (1919). The First Austrian Republic was founded in 1919. The Third Reich annexed Austria with the "Anschluss" in 1938.
Austrians
The end of World War II in 1945 saw the re-establishment of an independent Austria, although the Allied Powers remained in occupation until 1955, when the Austrian State Treaty between Austria and them was signed to end occupation and to regain Austrian sovereignty.
Immediately after 1945 the majority of Austrians still saw themselves as Germans, as a broader Austrian national identity took time to develop. In a 1956 survey, 46% of Austrians still considered themselves to be Germans. Another survey carried out in 1964 revealed that only 15% of Austrians still considered themselves to be Germans.