Coup Atlas Research Database
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81212311959SuccessfulMilitary coup

Laos, 1959 — military coup

Laos (LAO)Southeast Asia, AsiaDecember 31, 1959

Event Summary

On December 25, 1959, General Phoumi Nosavan, the defense minister and rising anti-communist strongman of the Kingdom of Laos, seized control of the capital Vientiane and the national government in a bloodless coup. The move came after Prime Minister Phoui Sananikone, following advice from the United Nations that Laos should adopt a strictly neutral policy, dismissed Phoumi and the other hardline Committee for the Defence of National Interests ministers from his cabinet on December 16. Phoumi, who favored a firmly anti-communist line against the Pathet Lao insurgency and enjoyed U.

S. and Thai backing, responded by using troops, including Captain Kong Le's 2nd Parachute Battalion, to occupy the capital's key installations without bloodshed. The coup established Phoumi as the dominant figure in Laotian politics.

His rule would itself be overturned only months later, in August 1960, by the very paratroop commander who had helped him seize Vientiane.

Researched Details

Researched

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

Target identified in Coup Atlas research: Government of Phoui Sananikone, Kingdom of Laos (displaced by Phoumi Nosavan's coup; not physically harmed)
RESEARCHED NAME
Key figures
Phoumi Nosavan (general who seized power)
Phoui Sananikone (prime minister whose government fell)
Kong Le (paratroop captain whose battalion occupied Vientiane)

Sources

On 16 December 1959 Phoui fired the CDNI ministers from his cabinet, including Phoumi; on 25 December General Phoumi took charge of the government in a bloodless coup, using Captain Kong Le and his 2nd Parachute Battalion to occupy Vientiane's infrastructure.
SOURCE REVIEWED Wikipedia, "Phoumi Nosavan" open source ↗
On 25 December 1959 Phoumi Nosavan orchestrated a bloodless coup in Vientiane, with troops under his command seizing key government buildings and installations without significant resistance, following the expiration of Prime Minister Phoui Sananikone's mandate.
SOURCE REVIEWED Grokipedia, "Phoumi Nosavan" open source ↗
General Phoumi Nosavan established himself as the strongman running Laos in a bloodless coup on 25 December 1959, and was himself overthrown on 10 August 1960 by the young paratroop captain who had backed him in the 1959 coup.
SOURCE REVIEWED Military Wiki, "1960 Laotian coups" open source ↗
The broader 1959-1960 Laos crisis is documented in U.S. records, including a State Department situation report and National Security Council briefing on a later Vientiane coup, reflecting the pattern of repeated well-advertised Laotian coups of the period.
INDIRECT CITATION U.S. Department of State, Foreign Relations of the United States, 1958-1960, Vol. XVI, Document 479 open source ↗

Editorial Note

The Cline dataset codes 31 December 1959; the sources consistently date Phoumi's bloodless seizure of Vientiane to 25 December 1959, so the dataset date is about a week late. The deposed government was that of Phoui Sananikone, who had just dismissed Phoumi. Two Wikipedia-derived sources and Grokipedia were read directly, with a FRUS document as a chain source for the broader crisis. This coup sets up the August 1960 Kong Le coup, another record in this dataset.

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
81212311959

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

Outcome and Target

Coup Atlas research identifies the target as: Government of Phoui Sananikone, Kingdom of Laos (displaced by Phoumi Nosavan's coup; not physically harmed).

Baseline coding: Incumbent executive removed from power. Recorded leader fate: deposed; 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
Open dataset DOI ↗
⚑ This citation establishes the coded baseline record; use the claim-level sources above for the researched narrative.

Baseline Source-Document Entries

Wikipedia

https://en.wikipedia.org/wiki/Phoui_San A Nikon E

New York Times

“Premier of Laos resigns in split,” December 31, 1959
“Army rules in Laos as Premier Resigns,” January 1, 1960
“COUP BY LEFTISTS IN LAOS REPORTED; Rebels Rule Capital, Hold Pro-U.S. Leaders Under Arrest, Thailand Hears COUP BY LEFTISTS IN LAOS REPORTED,” August 9, 1960

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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