Sukarno
Renville agreement and Madiun affair

The signing of highly disadvantageous Renville Agreement caused even greater instability within the Republican political structure. In Dutch-occupied West Java, Darul Islam guerrillas under Sekarmadji Maridjan Kartosuwirjo maintained their anti-Dutch resistance and repealed any loyalty to the Republic; they caused a bloody insurgency in West Java and other areas in the first decades of independence. Prime Minister Sjarifuddin, who signed the agreement, was forced to resign in January 1948 and was replaced by Hatta. Hatta cabinet's policy of rationalising the armed forces by demobilising large numbers of armed groups that proliferated the Republican areas also caused severe disaffection. Leftist political elements, led by resurgent Indonesian Communist Party (PKI) under Musso took advantage of public disaffections by launching a rebellion in Madiun, East Java, on 18 September 1948. Bloody fighting continued during late-September until end of October 1948, when the last communist bands were defeated, and Musso shot dead. The communists had overestimated their potential to oppose the strong appeal of Sukarno amongst the population.
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