United States of Indonesia

The United States of Indonesia (Indonesian: Republik Indonesia Serikat, lit. 'Republic of the United States of Indonesia'; Dutch: Verenigde Staten van Indonesië; abbreviated as RIS or RUSI, also known as Federal Republic of Indonesia) was a short-lived federal state to which the Netherlands formally transferred sovereignty of the Dutch East Indies (except Netherlands New Guinea) on 27 December 1949 following the Dutch–Indonesian Round Table Conference. This transfer ended the four-year conflict between Indonesian nationalists and the Netherlands for control of Indonesia.

Source: Wikipedia — United States of Indonesia (CC BY-SA 4.0)