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The United States of Indonesia (RIS) was a federated state consisted of states and territories inherited from the former governorates and regencies of the Dutch East Indies which was formally transferred to the Republic of Indonesia following the Round Table Conference through the Soevereiniteitsoverdracht in December 1949. The RIS comprised sixteen main entities: seven states (negara ), including the "Republic of Indonesia" consisting of parts of Java and Sumatra (a combined population of over 31 million); and the nine formerly directly-ruled territories (neo-lands, Dutch : neo-landschappen ).
Apart from the Republic of Indonesia , all these constituent entities, which had populations between 100,000 and 11 million, were established by the Dutch. Also included were some smaller entities not seen as viable as distinct political entities.
The last two states to dissolved and later merged into the territories of the Republic of Indonesia were State of East Indonesia and State of East Sumatra in August 1950 after it reached a concensus to "Dissolve and Merge" its territories to Indonesia in a Three-Way Conference .
Name
Established
Capital
Area (sq km)
Dissolved
Notes
Republic of Indonesia
17 August 1945
Yogyakarta
-
17 August 1950
-
States
East Indonesia
24 December 1946
Makassar
346,300
17 August 1950
Longest-lasting state
East Sumatra
25 December 1947
Medan
17,500
17 August 1950
Along with East Indonesia, the last state to be dissolved
Madura
20 February 1948
Pamekasan
5,500
9 March 1950
State
Pasundan
25 February 1948
Bandung
35,900
11 March 1950
State
South Sumatra
2 September 1948
Palembang
74,000
24 March 1950
State
East Java
27 November 1948
Surabaya
22,200
9 March 1950
State
Autonomous entities [ edit ]
Autonomous entities
West Borneo
12 May 1947
Pontianak
146,800
22 April 1950
East Borneo
12 May 1947
Samarinda
200,000
24 March 1950
Federation
Great Dayak
3 June 1947
Banjarmasin
132,000
4 April 1950
Neo-land
Bandjar
14 January 1948
-
26,000
4 April 1950
Southeast Borneo Federation
March 1947
-
14,100
4 April 1950
Federation
Bangka
July 1947
–
12,000
4 April 1950
Neo-land
Billiton
July 1947
–
4,800
4 April 1950
Neo-land
Riouw
July 1947
–
10,800
4 April 1950
Neo-land
Central Java
2 March 1949[ note 1]
Semarang
14,000
9 March 1950
Undefined political entity
^ Recognition by the Dutch authorities of the temporary representative body Schiller 1955 , p. 121 harvnb error: no target: CITEREFSchiller1955 (help )