Coup Atlas Research Database
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09512051990ConspiracyMilitary coup

Panama, 1990 — military coup conspiracy

Panama (PAN)Central America, AmericasDecember 5, 1990

Event Summary

This entry is coded 5 December 1990, corresponding to the armed uprising led by Colonel Eduardo Herrera Hassan against the government of President Guillermo Endara of Panama. After the December 1989 US invasion that removed Manuel Noriega and dissolved the Panama Defense Forces, the Endara government created a police-oriented Public Force and named Herrera Hassan, a former PDF officer with earlier close US ties, as its director. Herrera Hassan was dismissed in August 1990 on conspiracy charges, linked by investigators to a bombing campaign meant to pressure for a military rather than a purely police force, and was jailed.

On the night of 4 December 1990 he escaped detention by helicopter with help from former PDF members, seized the national police headquarters near Cerro Ancon, and around midday on 5 December marched with about a hundred men toward the presidency before being quickly surrounded and captured by US troops. The uprising coincided with a 4 to 5 December general strike; the government conflated the two and rapidly pushed through Law 25, dismissing nearly a thousand public employees. The 5 December 1990 coding matches this 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, put down the uprising and captured Herrera Hassan within a day
RESEARCHED NAME
Key figures
President Guillermo Endara (target)
Colonel Eduardo Herrera Hassan (uprising leader)
US forces stationed in Panama

Sources

On 5 December 1990 Colonel Eduardo Herrera Hassan led a brief and unsuccessful military uprising, seizing police headquarters in Panama City, which was put down by the US military stationed at the former Canal Zone bases.
SOURCE REVIEWED Wikipedia: Baena Ricardo et al. v. Panama open source ↗
Herrera Hassan, removed as head of the Panamanian police in August 1990 and detained on the accusation of plotting to destabilize the Endara administration, escaped by helicopter on the night of 4 December and took refuge with about a hundred men in the national police headquarters before marching toward the presidency on 5 December.
SOURCE REVIEWED Panama Vieja Escuela: La intentona militar en contra de Guillermo Endara open source ↗
The government linked a 4 and 5 December general strike to the Herrera Hassan takeover of police headquarters and rapidly pushed through Law 25 declaring the strike an illegal threat, dismissing nearly 1,000 public employees over the following days.
SOURCE REVIEWED Human Rights Watch (April 1991): Human Rights in Post-Invasion Panama open source ↗
Herrera Hassan had been fired on 22 August 1990 after a police investigation into 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

Coded 5 Dec 1990 matches the Herrera Hassan uprising (prison escape 4 Dec, seizure of police HQ and march 5 Dec, put down by US troops the same day). Verified, exact-date match. First of three Panama records 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
09512051990

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, put down the uprising and captured Herrera Hassan within a day.

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

“Rebels Are Posing Threat in Panama,” January 21, 1991

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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