Austria-Hungary, also known as the Democratic Republic of Austria-Hungary at this time, was the Austro-Hungarian state comprising of the former Austrian Democratic Republic and the Democratic Republic of Hungary that existed from 1958 to 1968, when it collapsed as a result of ethnic problems, which stemmed from the decision to make Austria-Hungary a unitary state. The union was a result of the Union of 1958. It was ruled by the Austro-Hungarian Socialist Unity Party.

The Austro-Hungarian dream however, was never fully recognized, as the government's reluctance to reform the nation into a federal state proved to be the downfall of the nation, and in 1958, the Democratic Republic of Austria-Hungary dissolved into the Second Austrian Democratic Republic and the Third Hungarian Republic.

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