| Negara Sumatera Timur Sumatra's Oostkust | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| State of the United States of Indonesia | |||||||||
| 1947 – 1950 (Sovereign state until 27 December 1949) | |||||||||
 Coat of arms
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 Location of East Sumatra within the United States of Indonesia | |||||||||
 State of East Sumatra and its major cities | |||||||||
| Capital | Medan | ||||||||
| Government | |||||||||
| Wali Negara | |||||||||
• 1947–1950 | Tengku Mansur | ||||||||
| Historical era | Indonesian National Revolution | ||||||||
• Established | 25 December 1947 | ||||||||
• Dissolution (law) | 15 August 1950 | ||||||||
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The State of East Sumatra (Negara Sumatera Timur) was established by the Netherlands after the reoccupation of North Sumatra in July, 1947, during the first of the Dutch 'police actions' against the fledgling Republic of Indonesia. In 1949, as part of a peace deal that concluded the Indonesian National Revolution, it joined the United States of Indonesia, of which the Republic was also a component state. In August, 1950, it was absorbed into the Republic as part of the province of North Sumatra. The area covered by the former state included the present-day regencies of Langkat (southern part), Deli Serdang, Serdang Bedagai, Karo, Simalungan, Batubara and Asahan (northern part), together with the cities geographically within those regencies.[1][2]
- ^ Reid 2014, pp. 274–277.
- ^ Van Langenberg 1976, pp. xxii.