Coup Atlas Research Database
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09504261959AttemptedDissident coup

Panama, 1959 — dissident coup attempt

Panama (PAN)Central America, AmericasApril 26, 1959

Event Summary

In late April 1959 a Cuban-backed force of some 80 to 90 fighters landed on the Caribbean coast of Panama in a failed attempt to spark a revolution against the government of President Ernesto de la Guardia, the first effort by Fidel Castro's newly victorious Cuba to export its revolution by guerrilla warfare. The expedition, coordinated with a coup plot by the Panamanian diplomat Roberto Tito Arias, husband of the British ballerina Margot Fonteyn, landed near Nombre de Dios on 24 to 25 April after Arias's own plot collapsed. The invaders, mostly Cubans led by Panamanians, found no local uprising, and the Panamanian National Guard, aided by an Organization of American States committee and pressure that led Castro to publicly disavow the venture, contained them.

On 1 May 1959 the surviving invaders surrendered, and de la Guardia's government emerged intact.

Researched Details

Researched

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

Target identified in Coup Atlas research: President Ernesto de la Guardia survived the invasion attempt and completed his term
RESEARCHED NAME
Key figures
Ernesto de la Guardia (president of Panama, target)
Roberto Tito Arias (Panamanian coup plotter)
Cuban and Panamanian invaders under Cesar Vega (expeditionaries)

Sources

The Cuban invasion of Panama was a military operation in April 1959 in which Cuban troops, with some Panamanian guerrillas, sought to initiate a revolution in Panama modeled after the Cuban example, led by Panamanian Enrique Morales in support of a coup attempt by Roberto Arias.
SOURCE REVIEWED Wikipedia, Cuban invasion of Panama open source ↗
The Cuban led force arrived on Panamanian shores on 24 April 1959 to support a coup attempt against the government, marking Cuba's first overseas military action after the revolution, orchestrated by diplomat Roberto Arias.
SOURCE REVIEWED Wikipedia, Cuban invasion of Panama open source ↗
The coup attempt was thwarted by the Panamanian National Guard with support from the United States, and on 1 May 1959, 87 invaders surrendered after negotiations with an Organization of American States committee.
SOURCE REVIEWED Wikipedia, Cuban invasion of Panama open source ↗
Invasions and invasion attempts by armed revolutionary elements against Panama, Nicaragua, and the Dominican Republic during April to June 1959 all failed, in view of the inadequacies of the expeditions and the failure of domestic elements to support them.
SOURCE REVIEWED U.S. State Department, FRUS 1958 to 1960 vol. V open source ↗

Editorial Note

Dataset date 26 April 1959 falls within the invasion span, which the main landing began on 24 to 25 April and ended with the 1 May surrender. Well documented. Part of the 1959 wave of Cuba linked Caribbean expeditions alongside the Dominican expedition 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
09504261959

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

Outcome and Target

Coup Atlas research identifies the target as: President Ernesto de la Guardia survived the invasion attempt and completed his term.

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.

Wikipedia

Newsday

“Panama Finds 2 nd Arms Cache; Charge Margot Knew About Plot,” April 24, 1959

The Observer

“Price of Coups Going Up,” April 26, 1959

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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