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The short-lived Transcaucasian Democratic Federative Republic was established on territory formerly part of the Russian Empire.
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Transcaucasian Democratic Federative Republic
1918 month-long state in the South Caucasus
The Transcaucasian Democratic Federative Republic was a short-lived state in the Caucasus that included most of the territory of the present-day Armenia, Azerbaijan and Georgia, as well as parts of Russia and Turkey. The state lasted only for a month before Georgia declared…Source: Wikipedia (CC BY-SA)
Russian Empire
Eurasian empire (1721–1917)
The Russian Empire was an empire that spanned most of northern Eurasia from its establishment in November 1721 until the proclamation of the Russian Republic in September 1917. At its height in the late 19th century, it covered about 22,800,000 km2 (8,800,000 sq mi), roughly…Source: Wikipedia (CC BY-SA)