Coup Atlas Research Database
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09510161990ConspiracyMilitary coup

Panama, 1990 — military coup conspiracy

Panama (PAN)Central America, AmericasOctober 16, 1990

Event Summary

This entry is coded 16 October 1990, during the Eduardo Herrera Hassan conspiracy period against the government of President Guillermo Endara of Panama, whose administration had begun the day of the December 1989 US invasion that removed Manuel Noriega and dissolved the Panama Defense Forces. Endara's government replaced the disbanded PDF with a police-oriented Public Force and appointed Colonel Herrera Hassan, a former PDF officer with earlier close ties to the United States, as its director. Herrera Hassan was dismissed on 22 August 1990 on charges of conspiracy, linked by investigators to a bombing campaign meant to pressure the government into maintaining a military rather than a purely police force, and was then detained.

His successor was in turn dismissed in October 1990, reflecting continuing turmoil within the new security force. The affair culminated on 5 December 1990, when Herrera Hassan escaped detention by helicopter, seized the national police headquarters in Panama City, and marched toward the presidency before being surrounded and captured by US troops. The 16 October 1990 coding sits in this period of conspiracy and instability within the Public Force between Herrera Hassan's August dismissal and his December uprising.

Researched Details

Researched

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

Target identified in Coup Atlas research: Endara's government, backed by US troops, defeated the December uprising and captured Herrera Hassan
RESEARCHED NAME
Key figures
President Guillermo Endara (target)
Colonel Eduardo Herrera Hassan (dismissed Public Force director)
US forces stationed in Panama

Sources

Herrera Hassan was dismissed as head of the Panamanian police in August 1990 and detained on the accusation of being part of a plot to destabilize the Endara administration, before escaping on 4 December and seizing the national police headquarters.
SOURCE REVIEWED Panama Vieja Escuela: La intentona militar en contra de Guillermo Endara open source ↗
Herrera Hassan was appointed director of the new Public Force, then dismissed on charges of conspiracy in August, replaced by Lieutenant Colonel Fernando Quezada, who was in turn dismissed in October of the same year.
SOURCE REVIEWED Wikipedia: Panama Defense Forces open source ↗
On 5 December 1990 Colonel Eduardo Herrera Hassan led a brief and unsuccessful military uprising, seizing police headquarters in Panama City, which was suppressed by the US military stationed at the former Canal Zone bases.
SOURCE REVIEWED Wikipedia: Baena Ricardo et al. v. Panama open source ↗
Herrera Hassan was fired on 22 August after a police investigation uncovered his alleged role in a group behind bomb attacks aimed at showing the Endara administration that the country needed a regular military force rather than just a police force.
SOURCE REVIEWED Baltimore Sun: Panama's defense chief reportedly fired over bomb attacks open source ↗

Editorial Note

No discrete plot is precisely dated 16 Oct 1990 in the sources located this session; the well-documented uprising was 5 Dec 1990, with Herrera Hassan's conspiracy arrest in August 1990. The coding sits in the intervening Herrera Hassan conspiracy and Public Force turmoil period. Context with strong framing. First Panama record in the 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
09510161990

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

Outcome and Target

Coup Atlas research identifies the target as: Endara's government, backed by US troops, defeated the December uprising and captured Herrera Hassan.

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.

The Sun

“Panama says it foiled coup attempt: Ex-security chief called plot leader,” October 19, 1990

The Ottawa Citizen

“AROUND THE WORLD: [Final Edition],” October 19, 1990

The Guardian

“News in brief: Panama coup plot uncovered,” October 19, 1990

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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