structural:expansion, information:filtering, information:extraction, structural:reformatting, linguistic:paraphrasing
Background

Tensions between the military and communists increased in April 1965, when Sukarno endorsed the immediate implementation of the PKI's proposal for a "fifth armed force" consisting of armed peasants and workers. However, this idea was rejected by the army's leadership as being tantamount to the PKI establishing its own armed forces. In May, the " Gilchrist Document " aroused Sukarno's fear of a military plot to overthrow him, a fear which he repeatedly mentioned during the next few months. On his independence day speech in August, Sukarno declared his intention to commit Indonesia to an anti-imperialist alliance with China and other communist countries and warned the army not to interfere.

While Sukarno devoted his energy for domestic and international politics, the economy of Indonesia deteriorated rapidly with worsening widespread poverty and hunger, while foreign debt obligations became unmanageable and infrastructure crumbled. Sukarno's Guided Democracy stood on fragile grounds due to the inherent conflict between its two underlying support pillars, the military and the communists. The military, nationalists, and the Islamic groups were shocked by the rapid growth of the communist party under Sukarno's protection. They feared the imminent establishment of a communist state in Indonesia. By 1965, the PKI had three million members and was particularly strong in Central Java and Bali. The party had become the most potent political party in Indonesia.