Coup Atlas Research Database
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45103231971AttemptedMilitary coup

Sierra Leone, 1971 — military coup attempt

Sierra Leone (SLE)West Africa, AfricaMarch 23, 1971

Event Summary

The dataset records an attempted military coup in Sierra Leone on 23 March 1971, during the government of Prime Minister Siaka Stevens, who had survived earlier military interventions and was consolidating his All People's Congress rule. In late March 1971 elements of the Sierra Leone military, reportedly led by the force commander Brigadier John Bangura, moved against Stevens's government, and shots were fired at the prime minister's residence. Fearing for his survival, Stevens called on neighboring Guinea, whose president Ahmed Sekou Toure sent troops to Freetown to shore up the government under a defense pact.

The coup attempt failed, Bangura was arrested, tried, and executed, and Stevens moved to secure his position, declaring Sierra Leone a republic in April 1971 with himself as executive president. Stevens went on to entrench a one-party state and dominate Sierra Leonean politics until 1985.

Researched Details

Researched

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

Target identified in Coup Atlas research: Prime Minister Siaka Stevens survived with Guinean military help and consolidated power as executive president
RESEARCHED NAME
Key figures
Siaka Stevens (prime minister of Sierra Leone, target)
John Bangura (force commander, coup leader, executed)
Ahmed Sekou Toure (Guinean president who sent troops)

Sources

Siaka Stevens led Sierra Leone from 1968, surviving military challenges and consolidating the rule of his All People's Congress party.
SOURCE REVIEWED Wikipedia, Siaka Stevens open source ↗
In March 1971 Stevens faced a military coup attempt and called on Guinea for military assistance, and Guinean troops were sent to Freetown to support his government.
SOURCE REVIEWED Wikipedia, Siaka Stevens open source ↗
Brigadier John Bangura, the force commander implicated in the 1971 coup attempt, was arrested, tried, and executed.
SOURCE REVIEWED Wikipedia, John Amadu Bangura open source ↗
Stevens declared Sierra Leone a republic in April 1971 with himself as executive president and went on to establish a one-party state, ruling until 1985.
SOURCE REVIEWED Wikipedia, Siaka Stevens open source ↗

Editorial Note

Dataset date 23 March 1971 corresponds to the Bangura coup attempt against Stevens; the day level detail is lightly documented in accessible English sources this session, so it is flagged, while the coup attempt, the Guinean intervention, Bangura's execution, and Stevens's consolidation 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
45103231971
Albrecht/Koehler/Schutz (CAM) id
CAM-451-1971-03-23

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

Outcome and Target

Coup Atlas research identifies the target as: Prime Minister Siaka Stevens survived with Guinean military help and consolidated power as executive president.

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

“Sierra Leone Army Puts Down a Coup,” March 24, 1971

Irish Times

“Coup Fails in Sierra Leone,” March 25, 1971

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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