Coup Atlas Research Database
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09209271952ConspiracyDissident coup

El Salvador, 1952 — dissident coup conspiracy

El Salvador (SLV)Central America, AmericasSeptember 27, 1952

Event Summary

The dataset records an event coded as a dissident coup conspiracy in El Salvador on 27 September 1952, a tentative coup attempt against the government of President Oscar Osorio with alleged Guatemalan backing. United States diplomatic records refer to a Guatemalan who was caught in the tentative coup d'etat in the late summer of 1952, part of a pattern the Salvadorans and Americans attributed to communist infiltration from the reformist Arbenz government in neighboring Guatemala. The Osorio government, which had come to power in the 1948 Majors' Coup and won election in 1950, imposed states of siege in March 1951 and September 1952 and enacted the 1952 Law in Defense of Democratic Order, under which it developed a policy of selective repression against labor leaders and students from 1952 onward.

The coded late-September 1952 date matches this crackdown and the tentative coup the embassy referenced.

Researched Details

Researched

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

Target identified in Coup Atlas research: President Oscar Osorio suppressed the plot and completed his term in 1956
RESEARCHED NAME
Key figures
Oscar Osorio (president of El Salvador, target)
Guatemala (alleged foreign backer)
Labor and student opposition (targets of the 1952 crackdown)

Sources

United States diplomats reported that a Guatemalan was caught in the tentative coup d'etat in the late summer of 1952 in El Salvador.
SOURCE REVIEWED U.S. State Department, FRUS 1952-54 vol. IV open source ↗
The Osorio government imposed states of siege in March 1951 and September 1952 and enacted the 1952 Law in Defense of Democratic Order.
SOURCE REVIEWED Grokipedia, Military dictatorship in El Salvador open source ↗
From 1952 until the end of his term, Osorio developed a policy of selective repression against labor leaders and students, framed by fear of Guatemala.
SOURCE REVIEWED Wikipedia, Oscar Osorio open source ↗
The Osorio government came into office as a result of the March 1948 revolution that overthrew President Castaneda, and Osorio was elected to a six-year term in 1950.
SOURCE REVIEWED U.S. State Department, FRUS 1952-54 vol. IV open source ↗

Editorial Note

Documented tentative coup: United States records confirm a foreign-backed coup attempt in El Salvador in the late summer of 1952, matching the coded 27 September 1952 date and the September 1952 state of siege. Lightly detailed in accessible sources but verified as a real plot with alleged Guatemalan backing. First El Salvador 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
09209271952

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

Outcome and Target

Coup Atlas research identifies the target as: President Oscar Osorio suppressed the plot and completed his term in 1956.

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

CSP

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

New York Times

“SALVADOR CHARGES A COMMUNIST PLOT: Assembly Votes State of Siege After Arsenals Are Found in a Series of Raids,” September 27, 1952
“SALVADOR SEIZES 1,200: Government Acts on Alleged Red Plot to Take Power,” September 28, 1952

Chicago Daily Tribune

“RED REVOLUTION PLOT SMASHED IN EL SALVADOR,” September 28, 1952

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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