The First Austrian Democratic Republic (German: Österreich Demokratische Republik) was a country in the Warsaw Pact and Union of Republics that existed between the signing of the Yalta Treaty in April of 1945—the agreement after the end of World War II which freed Austria from Nazi rule—and ended to with the establishment of a the Democratic Republic of Austria-Hungary. The period was marked by sour relations with Bavaria due to the loss of territories to them after the Treaty of Yalta.

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