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30 September Movement

1965 Indonesian military faction that attempted a coup

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Through Soviet Union, China and Cold War

In the early hours of 1 October 1965 in Jakarta, G30S assassinated six Indonesian Army generals, including the Commander of the Army Ahmad Yani, in an abortive coup d'état. The Coordinating Minister for Defense and Security, General Abdul Haris Nasution, survived the assassination attempt in his house after being urged to escape by his wife, and he jumped into the residence of the Iraqi ambassador next door. But his lieutenant Pierre Tendean was killed while trying to protect the general by claiming he was Nasution. Ade Irma Suryani, Nasution's daughter, was also shot during the chaos and died a few days later.

Later that morning, the organization declared that it was in control of media and communication outlets and claimed to have taken President Sukarno under its protection. During that chaotic morning, Sukarno decided to go to Halim Perdana Kusuma Airport, and eventually rejected giving his support to G30S. Meanwhile Suharto, alongside Nasution and other military officials, managed to suppress G30S in Jakarta. By the end of the day, the coup attempt had failed in the nation's capital. The leader of PKI, D.N. Aidit, who was also at Halim Airport during the coup attempt, decided to escape to Yogyakarta on 2 October 1965.

The bodies of the slain military officers in Jakarta were thrown into a well in Lubang Buaya, near Halim Airport. Suharto was involved in the evacuation process of the bodies on 4 October. The funeral procession for the seven military officers, known as Pahlawan Revolusi (Heroes of the Revolution), was held on 5 October 1965. At that time, Kompas described the funeral as being witnessed by a sea of people in Jakarta. Sukarno was notably absent from the funeral.

In the days and weeks that followed, the army, socio-political, and religious groups blamed the coup attempt on the Communist Party of Indonesia (PKI). Soon a mass purge was underway, resulting in the imprisonment and deaths of many actual or suspected Communist Party members and sympathizers. According to most estimates, at least between 500,000 to 1 million people were killed, with higher estimates reaching 2 to 3 million.

Investigations and questioning of Suharto's version of the events were long obstructed in Indonesia. While the Central Intelligence Agency (CIA) initially believed that Sukarno orchestrated the entire coup, several outside sources found inconsistencies and holes in Indonesian army claims, notably Benedict Anderson and Ruth McVey, who wrote the Cornell Paper that challenged it.

Background

From the late 1950s, President Sukarno's position depended on balancing the opposing and increasingly hostile forces of the army and the PKI. His "anti-imperialist" ideology made Indonesia increasingly dependent on the Soviet Union and particularly China.

In the 1960s, the conflict between the army and the PKI intensified when the PKI asked President Sukarno to support the establishment of a Angkatan kelima, a left-wing militia of workers and peasants armed primarily to support the ongoing confrontation with Malaysia. This proposal was opposed by the army generals of the TNI because they feared that the PKI would become a fifth column as a military militia against the TNI if a civil war occurred. The force itself had been trained by the Indonesian Air Force at Lubang Buaya near its headquarters at Halim Perdanakusuma Airport.

By 1965, at the height of the Cold War, the PKI had extensively penetrated all levels of government. With the support of Sukarno and the air force, the party gained increasing influence at the expense of the army, thus ensuring the army's enmity. By late 1965, the army was divided between a left-wing faction allied with the PKI and a right-wing faction that was being courted by the United States.

In need of Indonesian allies in its Cold War against the Soviet Union, the United States cultivated a number of ties with officers of the military through exchanges and arms deals. This fostered a split in the military's ranks, with the United States and others backing a right-wing faction against a left-wing faction leaning towards the PKI.

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