Coup Atlas Research Database
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81104171977AttemptedMilitary coup

Cambodia, 1977 — military coup attempt

Cambodia (KHM)Southeast Asia, AsiaApril 17, 1977

Event Summary

The dataset records an event coded as an attempted military coup in Cambodia, then Democratic Kampuchea, on 17 April 1977, during the genocidal rule of Pol Pot and the Khmer Rouge, whose regime was consumed by paranoid purges of its own ranks. By 1977 the Khmer Rouge leadership was convinced that traitors and enemy agents had infiltrated the party and army, and it conducted waves of arrests, torture, and execution of cadres accused of plotting against the center, many processed through the notorious Tuol Sleng, or S-21, interrogation prison. Any coup attempt in April 1977, on the second anniversary of the fall of Phnom Penh, came within that atmosphere of internal terror, and the alleged plotters, whether genuine dissidents or victims of manufactured conspiracies, were crushed.

Pol Pot survived the internal purges that decimated the regime's own leadership until the Khmer Rouge was driven from power not by a coup but by the Vietnamese invasion of December 1978 to January 1979, which ended the killing fields.

Researched Details

Researched

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

Target identified in Coup Atlas research: Pol Pot survived the alleged April 1977 plotting amid the Khmer Rouge's internal purges
RESEARCHED NAME
Key figures
Pol Pot (leader of Democratic Kampuchea, target)
Alleged plotters within the Khmer Rouge (purged)

Sources

Pol Pot led the Khmer Rouge regime of Democratic Kampuchea from 1975, presiding over a genocide and paranoid purges of the party's own ranks.
SOURCE REVIEWED Wikipedia, Pol Pot open source ↗
By 1977 the Khmer Rouge leadership believed traitors had infiltrated the party and conducted waves of arrests and executions of cadres.
SOURCE REVIEWED Wikipedia, Democratic Kampuchea open source ↗
Many accused cadres were processed through the Tuol Sleng or S-21 interrogation prison where they were tortured and executed.
SOURCE REVIEWED Wikipedia, Tuol Sleng Genocide Museum open source ↗
The Khmer Rouge was driven from power by the Vietnamese invasion of December 1978 to January 1979.
SOURCE REVIEWED Wikipedia, Cambodian Vietnamese War open source ↗

Editorial Note

No discrete documentation of a coup attempt precisely on 17 April 1977 in Cambodia was found in accessible English sources this session; the date is the second anniversary of the fall of Phnom Penh. The entry records the dataset's coding and the verified context of the Khmer Rouge's internal purges under Pol Pot, with the specific event and plotters unconfirmed, flagged as context only. First Cambodia record in the dataset 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
81104171977

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

Outcome and Target

Coup Atlas research identifies the target as: Pol Pot survived the alleged April 1977 plotting amid the Khmer Rouge's internal purges.

Baseline coding: Coup attempt failed to remove the incumbent. 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

CSP

Named in the baseline source document; no article citation was recorded.

LA Times

“Plot, Shakeup in Cambodia Told,” August 19, 1977

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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