Kuban–Black Sea Soviet Republic

The Kuban–Black Sea Soviet Republic (May 30 – July 6, 1918) was a short-lived republic of the Russian SFSR. Its capital was Yekaterinodar, now known as Krasnodar. It was created by merging the Black Sea Soviet Republic and Kuban Soviet Republic.

Source: Wikipedia — Kuban–Black Sea Soviet Republic (CC BY-SA 4.0)