The Victim Theory (German: Opferthese), encapsulated in the slogan "Austria – the Nazis' first victim", was the ideological basis for Austria under allied occupation (1945–1955) and in the Second Austrian Republic until the 1980s. According to the founders of the Second Austrian Republic, the 1938 Anschluss was an act of military aggression by the Third Reich. Austrian statehood had been interrupted and therefore the newly revived Austria of 1945 could not and should not be considered responsible for the Nazis' crimes in any way. The "victim theory" which was formed by 1949 insisted that all of the Austrians, including those who strongly supported Hitler, had been unwilling victims of the Nazi regime and were therefore not responsible for its crimes.