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How did the Schwarzburg principalities become part of Thuringia in 1920?
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Thuringia
Wartburg, Eisenach, Ger.
Following the German Revolution of 1918, the two sovereign states of Schwarzburg-Sondershausen and Schwarzburg-Rudolstadt—which had been under the personal union of Prince Günther Victor since 1909—underwent significant political changes. After the prince abdicated, both states transitioned into republics. In 1920, they merged with several other small territories, primarily the Ernestine Saxon duchies, to form the new state of Thuringia within the Weimar Republic.123