Coup Atlas Research Database
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45102011967ConspiracyMilitary coup

Sierra Leone, 1967 — military coup conspiracy

Sierra Leone (SLE)West Africa, AfricaFebruary 1, 1967

Event Summary

This entry is coded 1 February 1967, in the tense pre-election period that preceded Sierra Leone's first military coups, which came in March 1967. Prime Minister Albert Margai, whose Sierra Leone People's Party had been accused of corruption, favoritism toward the Mende, and moves toward a one-party state, was pushing in early 1967 a republican constitution that would replace the Governor-General with a Margai-appointed executive president. Ahead of the 17 March 1967 general election, Margai ran a heavy-handed campaign against the opposition All People's Congress led by Siaka Stevens, and the period was marked by plot and counter-plot, including the reported arrest of Brigadier John Bangura, accused of plotting to kill Margai and army commander David Lansana.

After the APC won the election, Lansana staged Sierra Leone's first coup on 21 March 1967, only to be overthrown two days later by a counter-coup that established the National Reformation Council. The February coding sits in this pre-election plotting phase.

Researched Details

Researched

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

Target identified in Coup Atlas research: Margai lost the March 1967 election; the ensuing coups blocked Stevens' inauguration before a counter-coup installed the National Reformation Council
RESEARCHED NAME
Key figures
Albert Margai (prime minister pushing a republican constitution)
Brigadier David Lansana (army commander who staged the March 1967 coup)
Siaka Stevens (APC opposition leader and election winner)

Sources

Margai led a heavy-handed campaign against opposition parties for the 17 March 1967 general elections, refusing to allow opposition candidates to register if they challenged his party's nominees.
SOURCE REVIEWED Wikipedia: 1967 Sierra Leonean coups d'etat open source ↗
Sierra Leone politics before the coups featured a stage-managed coup plot in which Brigadier John Bangura was arrested, allegedly for plotting to kill Sir Albert Margai and Lansana just before the elections.
SOURCE REVIEWED Cocorioko: 1967 Elections set the tone for Sierra Leone's turbulent politics open source ↗
In early 1967 Margai's government pursued a republican constitution that would replace the Governor-General with a Margai-appointed executive president, reducing checks on executive authority.
SOURCE REVIEWED Grokipedia: David Lansana open source ↗
After the APC's election victory, Brigadier Lansana staged Sierra Leone's first coup on 21 March 1967, and a counter-coup on 23 March established the National Reformation Council.
SOURCE REVIEWED Wikipedia: 1967 Sierra Leonean coups d'etat open source ↗

Editorial Note

No discrete plot is precisely dated 1 Feb 1967 in the sources located this session; the coding sits in the pre-election plotting period (including the reported Bangura plot) before the March 1967 coups. Context with strong framing. First Sierra Leone record in the run.

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
45102011967

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

Outcome and Target

Coup Atlas research identifies the target as: Margai lost the March 1967 election; the ensuing coups blocked Stevens' inauguration before a counter-coup installed the National Reformation Council.

Baseline coding: Plot discovered and disrupted before execution. 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.

New York Times

“Sierra Leone Reports Plot is Foiled,” February 9, 1967

The Sun

“Sierra Leone Regime Foils Military Plot,” February 9, 1967

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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