Coup Atlas Research Database
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09011061950AttemptedDissident coup

Guatemala, 1950 — dissident coup attempt

Guatemala (GTM)Central America, AmericasNovember 6, 1950

Event Summary

In November 1950 the exiled Guatemalan officer Carlos Castillo Armas launched a failed armed assault on Guatemala City in an attempt to overthrow the revolutionary government, striking as Jacobo Arbenz won the presidential election that month. Castillo Armas, a protege of the slain Colonel Francisco Arana who had gone into exile in Honduras after Arana's failed 1949 revolt, had already come to the notice of the U.S.

Central Intelligence Agency while seeking arms from Somoza and Trujillo. His November 1950 raid was swiftly crushed and he escaped back to Honduras, but the attempt confirmed him as a rallying figure for the anti-government exile networks. Four years later he would return at the head of the CIA's Operation PBSuccess to depose Arbenz in June 1954, becoming the first of a line of U.

S. backed strongmen.

Researched Details

Researched

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

Target identified in Coup Atlas research: President Juan Jose Arevalo's government survived, and president elect Jacobo Arbenz took office in March 1951; Arbenz was overthrown only in 1954
RESEARCHED NAME
Key figures
Juan Jose Arevalo and president elect Jacobo Arbenz (revolutionary government, target)
Carlos Castillo Armas (exiled coup leader)
Francisco Arana (Castillo Armas's slain patron)

Sources

After Arana's failed 1949 coup Castillo Armas went into exile in Honduras, and in 1950 he launched a failed assault on Guatemala City before escaping back to Honduras.
SOURCE REVIEWED Wikipedia, Carlos Castillo Armas open source ↗
Castillo Armas had encountered the CIA in January 1950 when an officer learned he was trying to obtain weapons from Anastasio Somoza Garcia and Rafael Trujillo.
SOURCE REVIEWED Wikipedia, Carlos Castillo Armas open source ↗
The largely free 1950 elections were won by the popular Arbenz and represented the first transfer of power between democratically elected leaders in Guatemala, held on 15 November 1950.
SOURCE REVIEWED Wikipedia, Guatemalan Revolution open source ↗
Arevalo survived at least 25 coup attempts during his term, including the 1949 Arana revolt, before Castillo Armas returned in 1954 to depose Arbenz through the CIA's Operation PBSuccess.
SOURCE REVIEWED Wikipedia, 1954 Guatemalan coup d'etat open source ↗

Editorial Note

Dataset date 6 November 1950 falls in the month of Castillo Armas's failed assault, which sources date to 1950 without a universally fixed day; the 15 November election is firmly dated. Precise day of the raid is not pinned in accessible English sources, flagged. Links to the 1949 Arana revolt, the 1953 Salama uprising, and the 1954 coup in the 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
09011061950

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

Outcome and Target

Coup Atlas research identifies the target as: President Juan Jose Arevalo's government survived, and president elect Jacobo Arbenz took office in March 1951; Arbenz was overthrown only in 1954.

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

Wikipedia

New York Herald Tribune

“Guatemala Revolt Put Down, 18 Killed,” November 7, 1950

Los Angeles Times

“17 Shot in Guatemalan Armed Political Revolt,” November 7, 1950

Washington Post

“20 Are Killed In Guatemala Airport Fight,” November 7, 1950

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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