Coup Atlas Research Database
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81208201973AttemptedMilitary coup

Laos, 1973 — military coup attempt

Laos (LAO)Southeast Asia, AsiaAugust 20, 1973

Event Summary

The dataset records an attempted military coup in Laos on 20 August 1973, during the fragile coalition period at the close of the Laotian Civil War, when the neutralist government of Prime Minister Souvanna Phouma was negotiating a ceasefire and a coalition with the communist Pathet Lao under the February 1973 Vientiane Agreement. This transitional moment, with rightist officers alarmed at the prospect of sharing power with the Pathet Lao, produced plots and attempted risings within the Royal Lao establishment. An attempted coup in August 1973 came within that context and did not unseat Souvanna Phouma, whose coalition government proceeded.

The tenuous settlement held only until the wider collapse of United States backed governments in Indochina in 1975, when the Pathet Lao took full control, abolished the monarchy, and established the Lao People's Democratic Republic, ending the long civil war and the era of neutralist coalition politics.

Researched Details

Researched

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

Target identified in Coup Atlas research: Prime Minister Souvanna Phouma's coalition government survived the August 1973 plotting
RESEARCHED NAME
Key figures
Souvanna Phouma (prime minister of Laos, target)
Rightist Royal Lao officers (plotters)

Sources

Souvanna Phouma led the neutralist Royal Lao Government as prime minister through the Laotian Civil War and its closing coalition period.
SOURCE REVIEWED Wikipedia, Souvanna Phouma open source ↗
The February 1973 Vientiane Agreement provided for a ceasefire and a coalition government between the Royal Lao Government and the communist Pathet Lao.
SOURCE REVIEWED Wikipedia, Laotian Civil War open source ↗
The prospect of sharing power with the Pathet Lao alarmed rightist officers and produced tension within the Royal Lao establishment during the transitional period.
SOURCE REVIEWED Wikipedia, Laotian Civil War open source ↗
The Pathet Lao took full control in 1975, abolishing the monarchy and establishing the Lao People's Democratic Republic.
SOURCE REVIEWED Wikipedia, Laotian Civil War open source ↗

Editorial Note

No discrete documentation of a coup attempt precisely on 20 August 1973 in Laos was found in accessible English sources this session; the entry records the dataset's coding and the verified context of the tense 1973 coalition transition under Souvanna Phouma, with the specific event and plotters unconfirmed, flagged as context only. Continues the Laos run from batches 65 and 66.

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
81208201973
Albrecht/Koehler/Schutz (CAM) id
CAM-812-1973-08-20

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

Outcome and Target

Coup Atlas research identifies the target as: Prime Minister Souvanna Phouma's coalition government survived the August 1973 plotting.

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.

Luttwak

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

Wikipedia

New York Times

“Rebellious Laotian Troops Encircle Premier’s Home ATTEMPTED COUP IS FOILED IN LAOS Broadcast Reports Coup U.S. Support Reaffirmed,” by David K. Shipler, August 20, 1973

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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