Coup Atlas Research Database
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84008271987AttemptedMilitary coup

Philippines, 1987 — military coup attempt

Philippines (PHL)Southeast Asia, AsiaAugust 27, 1987

Event Summary

On 28 August 1987 Colonel Gregorio Honasan led the most serious coup attempt yet against President Corazon Aquino, an assault by members of the Reform the Armed Forces Movement that came close to killing her and left dozens dead. Honasan, a charismatic officer and former aide to the dismissed defense minister Juan Ponce Enrile, had spent months secretly training and indoctrinating commandos at Fort Magsaysay. In the early hours of 28 August his rebels, riding buses, trucks, and three tanks into Manila, attacked Malacanang Palace, seizing parts of Camp Aguinaldo, Villamor Air Base, and several television stations, and mounting coordinated actions in Cebu and elsewhere.

Aquino's son, the future president Benigno Aquino III, was wounded and three of his guards killed in the palace assault. But loyalist forces under armed forces chief General Fidel Ramos counterattacked with artillery and vintage aircraft and, by the end of the day, retook the rebel held sites; the coup collapsed by 29 August. Fifty three people died, many of them civilians.

Honasan escaped by helicopter, and the failed coup pushed Aquino's government to the right.

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 Honasan's August 1987 coup, crushed by loyalist forces with 53 killed
RESEARCHED NAME
Key figures
Corazon Aquino (president of the Philippines, target)
Gregorio Honasan (RAM colonel, coup leader)
Fidel Ramos (loyalist armed forces chief who crushed the coup)

Sources

On 28 August 1987 a coup against President Corazon Aquino was staged by members of the Reform the Armed Forces Movement led by Colonel Gregorio Honasan, and was repelled by forces loyal to Aquino within the day, although Honasan escaped.
SOURCE REVIEWED Wikipedia, August 1987 Philippine coup attempt open source ↗
In the early morning rebel soldiers attacked Malacanang Palace, and Aquino's son, the future President Benigno Aquino III, was wounded while several of his guards were killed.
SOURCE REVIEWED Wikipedia, 1986 to 1987 Philippine coup attempts open source ↗
Honasan led soldiers that seized portions of Camp Aguinaldo, and rebels also seized parts of Villamor Air Base, three television stations, and camps in Pampanga and Cebu.
SOURCE REVIEWED Wikipedia, 1986 to 1987 Philippine coup attempts open source ↗
A total of 53 people were killed and over 200 wounded, many of them unarmed civilians, and Honasan escaped from Camp Aguinaldo aboard a helicopter.
SOURCE REVIEWED Wikipedia, August 1987 Philippine coup attempt open source ↗

Editorial Note

Dataset date 27 August 1987 corresponds to the coup that broke out in the early hours of 28 August 1987 (UPI reported the uprising on 27 August); the one day framing is flagged. Dataset codes it a military coup with leader unharmed, accurate for Aquino. Extensively documented. Fifth and deadliest Philippines record in this batch; Honasan links it to the November 1986 and December 1989 attempts.

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
84008271987
Albrecht/Koehler/Schutz (CAM) id
CAM-840-1987-08-27-2

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 Honasan's August 1987 coup, crushed by loyalist forces with 53 killed.

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

“Major Events in Philippines Coup Attempt,” August 29, 1987

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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