Transcaucasian Democratic Federative Republic
The Transcaucasian Democratic Federative Republic (TDFR; 22 April – 28 May 1918) 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 independence, followed shortly after by Armenia and Azerbaijan.
Source: Wikipedia — Transcaucasian Democratic Federative Republic (CC BY-SA 4.0)