Coup Atlas Research Database
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80007041984ConspiracyDissident coup

Thailand, 1984 — dissident coup conspiracy

Thailand (THA)Southeast Asia, AsiaJuly 4, 1984

Event Summary

This entry is coded 4 July 1984, during a period of intense military factional tension under Prime Minister Prem Tinsulanonda of Thailand, between the 1981 Young Turks rebellion and the September 1985 coup attempt. Prem, a retired general who had survived the April 1981 coup attempt and multiple 1982 assassination attempts, presided over a rivalry between his ally General Chavalit Yongchaiyudh and the faction around Supreme Commander Arthit Kamlang-ek and General Pichit Kullavanich, with a race under way to succeed Arthit as forces chief. In July 1984 the Royal Thai Police arrested 22 former Communist Party members and the prominent intellectual Sulak Sivaraksa on a lese-majeste charge, moves tied to the factional maneuvering intended to discredit Chavalit over the communist amnesty policy.

On 15 September 1984 police arrested Young Turks leader Manoonkrit (Manoon) Roopkachorn on charges of an attempted 1982 assassination of Queen Sirikit, Prem, and Arthit. The 4 July 1984 coding sits in this 1984 climate of factional plotting and conspiracy against the Prem government, in the lead-up to the September 1985 coup attempt.

Researched Details

Researched

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

Target identified in Coup Atlas research: Prem survived the 1984 factional plotting and the September 1985 coup attempt, remaining prime minister until 1988
RESEARCHED NAME
Key figures
Prime Minister Prem Tinsulanonda (target)
Manoon Roopkachorn and the Young Turks
the Chavalit vs Arthit-Pichit military factions

Sources

Under Chavalit's lead in the communist insurgency war, the Royal Thai Police arrested 22 former Communist Party members in July 1984, and Sulak Sivaraksa on a lese-majeste charge, in moves intended to discredit Chavalit by the Pichit and Phiraphon side.
SOURCE REVIEWED Wikipedia: 1985 Thai coup attempt open source ↗
On 15 September 1984 police arrested Manoonkrit Roopkachorn, an attempted-coup leader, and Bunluesak Phojaroen of Class 7 on charges of the attempted assassination of Queen Sirikit, Prem, and Arthit in 1982.
SOURCE REVIEWED Wikipedia: 1985 Thai coup attempt open source ↗
Prem was the target of at least four assassination attempts in 1982, with the investigation implicating military officers who were among the 1981 coup's leaders and former communists who opposed his amnesty policy.
SOURCE REVIEWED Wikipedia: Prem Tinsulanonda open source ↗
Colonel Manoon Roopkachorn, leader of the Young Turks who mounted the 1981 effort to oust Prem, had discussed a coup with Prachak five months before the 9 September 1985 attempt, pinning his hopes on the outcome of the annual military promotions.
SOURCE REVIEWED Christian Science Monitor: Thailand unlikely to have seen its last coup open source ↗

Editorial Note

No discrete coup is precisely dated 4 Jul 1984 in the sources located this session; the well-documented Thai coups of this era are April 1981 and September 1985. The coding sits in the 1984 factional-conspiracy climate (the July 1984 arrests, plotting toward the 1985 attempt). Context with strong framing. First Thailand 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
80007041984

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

Outcome and Target

Coup Atlas research identifies the target as: Prem survived the 1984 factional plotting and the September 1985 coup attempt, remaining prime minister until 1988.

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

Wall Street Journal

“World-Wide [1],” July 5, 1984

New York Times

“16 Thai Communists Seized in Purported Plot,” July 5, 1984

LA Times

“Thailand Seizes 16 Communist Party Members,” July 5, 1984

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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