The Transcaucasian Federal Socialist Republic (TSFR) is country located in the South Caucasus that is geopolitical region located on the border of Eastern Europe and Southwest Asia. It borders on the North with Russian FSR, on the East with the Caspian Sea, on the South with Turkey and Iran, and on the West with the Black Sea. Member of the Federation of Socialist Republics since 1923. Name in the official languages: