Coup Atlas Research Database
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84012011989AttemptedMilitary coup

Philippines, 1989 — military coup attempt

Philippines (PHL)Southeast Asia, AsiaDecember 1, 1989

Event Summary

Beginning on 1 December 1989 the most serious and bloodiest coup attempt against Philippine President Corazon Aquino was launched by an alliance of Reform the Armed Forces Movement rebels under Colonel Gregorio Honasan and soldiers loyal to the late Ferdinand Marcos, in a large, well financed Christmas time assault that came close to toppling her government. Upwards of three thousand troops, including elite Scout Rangers and marines, mounted coordinated attacks that seized Villamor Air Base, Sangley Point, Mactan Air Base in Cebu, Fort Bonifacio, and parts of Camp Aguinaldo, and rebel aircraft dive bombed and strafed Malacanang Palace, Camp Crame, and Camp Aguinaldo. With loyalist forces hard pressed and much of Manila's public staying home rather than rallying to her as in 1986, Aquino took the extraordinary step of requesting United States military help, and American jets from Clark Air Base, in Operation Classic Resolve, buzzed the rebel airfields and cleared the skies, allowing government F-5s to destroy the rebel T-28s.

The coup was defeated by 9 December, though rebels holed up in Makati high rises for days. Aquino survived, and the failed coup pushed her government rightward.

Researched Details

Researched

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

Target identified in Coup Atlas research: President Corazon Aquino survived the December 1989 coup, the largest against her, with decisive US air support
RESEARCHED NAME
Key figures
Corazon Aquino (president of the Philippines, target)
Gregorio Honasan (RAM colonel, coup leader)
Edgardo Abenina and Jose Ma. Zumel (allied rebel leaders)

Sources

The 1989 Philippine coup attempt was the most serious against President Corazon Aquino, staged beginning 1 December 1989 by members of the Reform the Armed Forces Movement and soldiers loyal to Marcos, and completely defeated by 9 December 1989.
SOURCE REVIEWED Wikipedia, 1989 Philippine coup attempt open source ↗
The attempt involved upwards of 3,000 troops including elite Scout Rangers and marines in coordinated attacks on Camp Crame, Camp Aguinaldo, Fort Bonifacio, Cavite Naval Base, Villamor Air Base, and Malacanang Palace, which was dive-bombed by T-28 aircraft.
SOURCE REVIEWED Military Wiki, 1989 Philippine coup attempt open source ↗
Aquino requested United States support, and in Operation Classic Resolve US F-4 jets from Clark Air Base buzzed the rebel airfields, contributing to the collapse of the coup.
SOURCE REVIEWED Wikipedia, 1989 Philippine coup attempt open source ↗
Government F-5 jets destroyed the rebel T-28 Trojans, and government forces recaptured the bases, though rebels retreating from Fort Bonifacio occupied high-rise buildings in the Makati business area.
SOURCE REVIEWED Military Wiki, 1989 Philippine coup attempt open source ↗

Editorial Note

Date match to the 1 December 1989 coup attempt. Dataset codes it a military coup with leader unharmed, accurate for Aquino. Extensively documented. Sixth Philippines record in the run (following the five in batch 77); the largest and bloodiest against Aquino, notable for the US Operation Classic Resolve air intervention. Honasan led both this and the August 1987 attempt.

Cross-Reference

Datasets agree. At least two of the three reference datasets we check against carry this event, and none of them disagrees about its date or its result.

Identifiers for finding this same event in the other datasets:

Cline Center id
84012011989
Albrecht/Koehler/Schutz (CAM) id
CAM-840-1989-12-01

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

Outcome and Target

Coup Atlas research identifies the target as: President Corazon Aquino survived the December 1989 coup, the largest against her, with decisive US air support.

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

New York Times

“AQUINO’S FORCES SEEM TO PREVAIL IN MANILA BATTLE,” December 2, 1989

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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