Coup Atlas Research Database
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10011171957ConspiracyDissident coup

Colombia, 1957 — dissident coup conspiracy

Colombia (COL)South America, AmericasNovember 17, 1957

Event Summary

The dataset records an event coded as a dissident conspiracy in Colombia on 17 November 1957, during the five-man Military Junta period that followed the nonviolent overthrow of dictator Gustavo Rojas Pinilla in May 1957. This November marked the pact-building climax of the National Front (Frente Nacional) process: the Liberal and Conservative leaders finalized the Pact of San Carlos, leading into the 1 December 1957 plebiscite that overwhelmingly approved the bipartisan power-sharing arrangement and set a return to civilian rule for August 1958. No discrete named plot precisely on 17 November 1957 appears in accessible sources; the entry is thin.

The relevant context is the dissident maneuvering against the interim junta during the fragile National Front transition, a period of considerable political tension as the two traditional parties negotiated the terms of alternating power.

Researched Details

Researched

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

Target identified in Coup Atlas research: The military junta oversaw the National Front transition and handed power to civilian rule in 1958
RESEARCHED NAME
Key figures
Colombian Military Junta (five-man interim government)
Alberto Lleras Camargo and Laureano Gomez (National Front architects)
Dissident anti-junta elements (plotters)

Sources

The 1957 Colombian coup was the nonviolent overthrow of the Rojas Pinilla dictatorship, resulting in a five-man junta that restored civilian rule a year later in 1958.
SOURCE REVIEWED Wikipedia, 1957 Colombian coup d'etat open source ↗
Differences between the two party leaders were finally quelled in November 1957 in the Pact of San Carlos, part of the National Front process.
SOURCE REVIEWED Wikipedia, National Front (Colombia) open source ↗
In December 1957, Colombians voted overwhelmingly in a national plebiscite to approve the Sitges and San Carlos agreements as constitutional amendments.
SOURCE REVIEWED OnWar, The Violencia in Colombia 1948-1958 open source ↗

Editorial Note

No discrete plot precisely on 17 November 1957 was found in accessible sources this session; the entry records the dataset's coding and the context of the National Front pact-building and December 1957 plebiscite lead-up under the interim junta. Flagged as context only. Distinct from the May 1957 coup. First Colombia record in the dataset run; pairs with the 4 December 1958 Colombia record in this batch.

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
10011171957

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

Outcome and Target

Coup Atlas research identifies the target as: The military junta oversaw the National Front transition and handed power to civilian rule in 1958.

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

The Jerusalem Post

“Colombian Coup Reported Smashed,” November 19, 1957

New York Times

“Colombia Foils Pro-Rojas Plot: Junta Says Forces Thwart Plan to Oust Regime and Resort Exiled Dictator,” November 19, 1957

Washington Post and Times Herald

“Colomnian Plot Foiled, Junta Says,” November 19, 1957

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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