In World War II, Germany annexed Austria, thereby jeopardizing the lives of many Jews, including Lisa Meitner. According to The Nuclear Express by Thomas C. Reed and Danny B. Stillman, Lisa Meitner found it hard to emigrate outside of Austria because her Austrian passport was no longer valid, because Austria wasn't a country. Did the allied powers stop recognizing Austria as a country?
Austria ceased to exist as a fully independent nation until late 1945. A Provisional Austrian Government was set up on April 27, 1945 and was legally recognized by the Allies in the following months, but it was not until 1955 that Austria regained full sovereignty.