Coup Atlas Research Database
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80006291951AttemptedMilitary coup

Thailand, 1951 — military coup attempt

Thailand (THA)Southeast Asia, AsiaJune 29, 1951

Event Summary

On 29 June 1951 dissident Royal Thai Navy officers seized Prime Minister Plaek Phibunsongkhram during a ceremony aboard the American dredge Manhattan and confined him on the warship Sri Ayutthaya, launching the coup attempt known as the Manhattan Rebellion. Negotiations between the navy rebels and the government broke down, and violent street fighting erupted in Bangkok between the navy and the army, which was backed by the air force. When aircraft bombed the Sri Ayutthaya, Phibun was able to swim to shore, and with their hostage gone the navy was forced to surrender.

The rebellion, the latest failed rising against Phibun's coup plagued second premiership after the 1948 Army General Staff plot and the 1949 Palace Rebellion, ended in a purge and drastic reduction of the navy, and set the stage for the army's consolidating Silent Coup in November 1951.

Researched Details

Researched

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

Target identified in Coup Atlas research: Prime Minister Plaek Phibunsongkhram was seized and briefly held hostage but escaped by swimming ashore and remained in power until 1957
RESEARCHED NAME
Key figures
Plaek Phibunsongkhram (prime minister of Thailand, target, taken hostage)
Dissident Royal Thai Navy officers (rebels)
Royal Thai Army and Air Force (loyalist forces)

Sources

On 29 June 1951 Phibun was attending a ceremony aboard the Manhattan, a US dredge boat, when he was taken hostage by Royal Thai Navy officers, who confined him aboard the warship Sri Ayutthaya.
SOURCE REVIEWED Wikipedia, Plaek Phibunsongkhram open source ↗
Negotiations swiftly broke down, leading to violent street fighting in Bangkok between the navy and the army supported by the air force, and Phibun escaped and swam back to shore when the Sri Ayutthaya was bombed, after which the navy laid down their arms.
SOURCE REVIEWED Wikipedia, Plaek Phibunsongkhram open source ↗
In June 1951 marine and navy troops rebelled and abducted Phibun, and the revolt, put down by loyal army and air force units, resulted in a serious cutback of navy strength and a purge of senior naval officers.
SOURCE REVIEWED GlobalSecurity, Thailand, November 1947 Coup open source ↗
The Manhattan Rebellion was key to understanding the Silent Coup of 1951, after which, the navy having been defeated, the government essentially dismantled the navy.
SOURCE REVIEWED ExpatInsurance, History of Thailand, Every Coup in Thailand open source ↗

Editorial Note

Exact date match and the dataset's INJURED leader fate is consistent with Phibun being seized and forced to swim ashore under fire. Part of the Thai coup chain running from 1947 and 1948 through the Palace Rebellion enriched in batch 57 to the November 1951 Silent Coup and Sarit's 1957 takeover in the dataset.

Cross-Reference

Datasets agree. At least two of the three reference datasets we check against carry this event, and none of them disagrees about its date or its result.

Identifiers for finding this same event in the other datasets:

Cline Center id
80006291951
Albrecht/Koehler/Schutz (CAM) id
CAM-800-1951-06-29

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

Outcome and Target

Coup Atlas research identifies the target as: Prime Minister Plaek Phibunsongkhram was seized and briefly held hostage but escaped by swimming ashore and remained in power until 1957.

Baseline coding: Coup attempt failed to remove the incumbent. Recorded leader fate: remained in office; injured. 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.

Luttwak

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

Wikipedia

New York Times

“Thailand to End Martial Law,” August 24, 1951

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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