Coup Atlas Research Database
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45103231987AttemptedDissident coup

Sierra Leone, 1987 — dissident coup attempt

Sierra Leone (SLE)West Africa, AfricaMarch 23, 1987

Event Summary

The dataset records an event coded as an attempted dissident coup in Sierra Leone on 23 March 1987 against President Joseph Saidu Momoh, who had succeeded the long ruling Siaka Stevens in 1985 at the head of the one party state dominated by the All People's Congress. Momoh inherited a country in deep economic decay, riddled with corruption and patronage, and his early rule was marked by instability and plotting within the political and military elite. In March 1987 an alleged coup plot against Momoh was uncovered, reportedly implicating senior officials, including the first vice president Francis Minah, who was accused of conspiring to overthrow and assassinate the president.

The plot was suppressed and led to a major treason trial; Minah and several others were convicted and, in 1989, executed. Momoh survived this challenge but presided over the continuing collapse of the Sierra Leonean state, which slid toward the catastrophic civil war that erupted in 1991, and he was himself overthrown in a military coup in 1992.

Researched Details

Researched

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

Target identified in Coup Atlas research: President Joseph Saidu Momoh suppressed the March 1987 plot and executed the conspirators including Vice President Minah
RESEARCHED NAME
Key figures
Joseph Saidu Momoh (president of Sierra Leone, target)
Francis Minah (first vice president, accused plotter, later executed)

Sources

Joseph Saidu Momoh succeeded Siaka Stevens as president of Sierra Leone in 1985 at the head of the one party All People's Congress state.
SOURCE REVIEWED Wikipedia, Joseph Saidu Momoh open source ↗
Momoh inherited a country in deep economic decay marked by corruption and instability.
SOURCE REVIEWED Wikipedia, Joseph Saidu Momoh open source ↗
A 1987 coup plot against Momoh implicated First Vice President Francis Minah, who was convicted of treason and executed in 1989.
SOURCE REVIEWED Wikipedia, Francis Minah open source ↗
Momoh presided over the continuing collapse of the state toward the 1991 civil war and was overthrown in a military coup in 1992.
SOURCE REVIEWED Wikipedia, Joseph Saidu Momoh open source ↗

Editorial Note

Dataset date 23 March 1987 corresponds to the coup plot against Momoh implicating Vice President Minah; the exact day is lightly documented in accessible English sources this session and flagged, while the plot, the treason trial, and the 1989 executions are verified. First Sierra Leone record in the dataset run.

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
45103231987
Albrecht/Koehler/Schutz (CAM) id
CAM-451-1987-03-23

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

Outcome and Target

Coup Atlas research identifies the target as: President Joseph Saidu Momoh suppressed the March 1987 plot and executed the conspirators including Vice President Minah.

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

Chicago Tribune

“SIERRA LEONE LOYALISTS THWART COUP ATTEMPT,” March 24, 1987

Globe and Mail

“AROUND THE WORLD Coup foiled in Sierra Leone,” March 24, 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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