Coup Atlas Research Database
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85012191969ConspiracyMilitary coup

Indonesia, 1969 — military coup conspiracy

Indonesia (IDN)Southeast Asia, AsiaDecember 19, 1969

Event Summary

This entry is coded 19 December 1969, during the consolidation of General Suharto's New Order in Indonesia. Suharto had risen to power after the abortive 30 September 1965 movement, the ensuing anti-communist mass killings of 1965 to 1966 that destroyed the Indonesian Communist Party, and the gradual sidelining of President Sukarno, who was stripped of power in 1967 and lived under house arrest. By 1969 the New Order was firmly entrenched and vigilant against residual opposition: mass detention of alleged communists continued, with roughly 10,000 people held without trial on Buru Island from 1969, and in that year the army staged the controversial Act of Free Choice plebiscite in West Papua while Muslim dissidents with Darul Islam ties formed an alliance against the New Order.

The December 1969 coding sits in this period of New Order consolidation, latent opposition, and army vigilance against perceived subversion, rather than a single well-documented coup attempt on that date.

Researched Details

Researched

Independent research, added record by record. Hover any label for what it means.

Target identified in Coup Atlas research: Suharto's New Order held firm control; he remained president until 1998
RESEARCHED NAME
Key figures
General Suharto (New Order leader)
Sukarno (deposed president under house arrest)
Residual PKI remnants and other opposition (targets of vigilance)

Sources

Between 1969 and 1980, approximately 10,000 persons, primarily known or purported communists, were detained without trial on Buru Island in the Moluccas.
SOURCE REVIEWED Britannica: Indonesia from the coup to the end of the New Order open source ↗
In March 1967 the provisional parliament named Suharto acting president; he was formally elected president one year later, and Sukarno lived under house arrest until his death in 1970.
SOURCE REVIEWED Wikipedia: Transition to the New Order open source ↗
In 1969 the army staged a fraudulent plebiscite in West Papua (the Act of Free Choice), prompting the Free Papua Movement to declare independence.
SOURCE REVIEWED Jacobin: Indonesia Still Hasn't Escaped Suharto's Genocidal Legacy open source ↗
In 1969, Muslim dissidents with ties to Darul Islam formed an alliance in opposition to the New Order.
SOURCE REVIEWED Jacobin: Indonesia Still Hasn't Escaped Suharto's Genocidal Legacy open source ↗

Editorial Note

No discrete plot is precisely dated 19 Dec 1969 in the sources located this session; the coding sits in the New Order consolidation period of latent opposition and army vigilance. Context with framing tied to the well-documented 1965-67 New Order transition rather than a specific Dec 1969 event. First Indonesia record in the run.

Cross-Reference

Only one dataset carries it. One of the three reference datasets we check against carries this event; the others do not list it. That is not a contradiction — the datasets cover different periods and use different thresholds — but it means the record has had less outside corroboration.

Identifiers for finding this same event in the other datasets:

Cline Center id
85012191969

How the match is made is described in crossref-report.md.

Outcome and Target

Coup Atlas research identifies the target as: Suharto's New Order held firm control; he remained president until 1998.

Baseline coding: Plot discovered and disrupted before execution. Recorded leader fate: remained in office; not physically harmed. The baseline file does not name individual targets; researched names are kept in a separate layer.

Baseline Dataset Citation

Cline Center Coup d’État Project Dataset, v2.2.2
Peyton, Buddy, Joseph Bajjalieh, Michael Martin, and Andrea Gerald. 2026. Cline Center Coup d’État Project Dataset. Cline Center for Advanced Social Research. V.2.2.2. February 17. University of Illinois Urbana-Champaign. doi: 10.13012/B2IDB-9651987_V10
⚑ This citation establishes the coded baseline record; use the claim-level sources above for the researched narrative.

Baseline Source-Document Entries

The Globe and Mail

“Called Sukarno Backers: Indonesia Arrests Top Army Officers,” December 20, 1969

The Irish Times

“Sukarno Plot Is Smashed By Army,” December 20, 1969

New York Times

“Officer Held In PLot To Return Sukarno,” December 20, 1969
“Further Arrests Indicated in Indonesia,” January 4, 1970

This is the citation trail carried by the baseline dataset, grouped by outlet and rejoined from the line-wrapped original. Coup Atlas has not independently re-checked every document; read the original before citing a specific claim. URLs the import damaged beyond safe repair are shown as plain text and listed in citations-report.md. How this list is built →

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