an Entity references as follows:
The Republics of the Union of Soviet Socialist Republics or the Union Republics (Russian: Сою́зные Респу́блики, tr. Soyúznye Respúbliki) were national-based administrative units of the Union of Soviet Socialist Republics (USSR). The Soviet Union was formed in 1922 by a treaty between the Soviet republics of Byelorussia, Russia, Transcaucasia, and Ukraine, by which they became its constituent republics.