Coup Atlas Research Database
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84004181987AttemptedMilitary coup

Philippines, 1987 — military coup attempt

Philippines (PHL)Southeast Asia, AsiaApril 18, 1987

Event Summary

The dataset records an attempted military coup in the Philippines on 18 April 1987, when rebel troops stormed army headquarters in Manila in a bid to free soldiers who had been detained in connection with the failed January 1987 seizure of the GMA broadcast complex against President Corazon Aquino. The action was part of the continuing turmoil within the Philippine armed forces, driven by Marcos loyalists and elements of the Reform the Armed Forces Movement who remained determined to bring down or reshape Aquino's government barely a year after the People Power Revolution. The attempt to storm the headquarters and release the imprisoned mutineers failed; the rebels were contained and later surrendered to loyalist government forces.

Aquino survived this, one of the string of coup attempts against her in 1986 and 1987, but the persistence of such plots kept her government under constant strain and steadily pushed it toward greater reliance on the loyal armed forces chief General Fidel Ramos, who repeatedly proved decisive in defeating the rebels and who would later succeed Aquino as president.

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's forces repelled the April 1987 storming of army headquarters and the rebels surrendered
RESEARCHED NAME
Key figures
Corazon Aquino (president of the Philippines, target)
rebel soldiers (plotters)
Fidel Ramos (loyalist armed forces chief)

Sources

On 18 April 1987 rebel troops stormed army headquarters in Manila in an attempt to free soldiers held in connection with the January coup attempt, then surrendered to loyal government troops.
SOURCE REVIEWED Washington Post, Coup Attempts Against Aquino open source ↗
The attempt was one of a series of plots to overthrow Aquino in 1986 and 1987 by Marcos loyalists and members of the Reform the Armed Forces Movement.
SOURCE REVIEWED Wikipedia, 1986 to 1987 Philippine coup attempts open source ↗
The January 1987 coup attempt to which the detained soldiers were linked involved the seizure of the GMA Network compound in Quezon City.
SOURCE REVIEWED Wikipedia, 1986 to 1987 Philippine coup attempts open source ↗
General Fidel Ramos remained loyal to Aquino and was decisive in quelling the coup attempts against her.
SOURCE REVIEWED Wikipedia, August 1987 Philippine coup attempt open source ↗

Editorial Note

Date match to the 18 April 1987 storming of army headquarters. Dataset codes it a military coup with leader unharmed, accurate for Aquino. Documented via contemporaneous Washington Post timeline; a follow on to the January 1987 attempt. Fourth Philippines record 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
84004181987

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

Outcome and Target

Coup Atlas research identifies the target as: President Corazon Aquino's forces repelled the April 1987 storming of army headquarters and the rebels surrendered.

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

Washington Post

“COUP ATTEMPTS AGAINST AQUINO,” December 2, 1989

LA Times

“WORLD IN BRIEF : PHILIPPINES : Officer Gets 12 Years for ’87 Coup Attempt,” February, 14 1987

The Final Report of the Fact-Finding Commission - October 1990

https://web.archive.org/web/20210427074538/https://www.official gazette.gov.ph/downloads/1990/10 oct/199010-Report-Fact-Finding-Commission.pdf

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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