Coup Atlas Research Database
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48405131968AttemptedDissident coup

Congo, 1968 — dissident coup attempt

Congo (COG)Central Africa, AfricaMay 13, 1968

Event Summary

The dataset records an event coded as an attempted dissident coup in the Republic of the Congo, or Congo Brazzaville, on 13 May 1968, during the deteriorating final phase of the Marxist government of President Alphonse Massamba-Debat. Since surviving the June 1966 paratrooper revolt with Cuban help, Massamba-Debat had remained locked in a struggle with the northern military faction around Captain Marien Ngouabi and with his own party militia and radical youth. In 1968 this conflict escalated through a series of confrontations over control of the army and the single party.

Any coup attempt in May 1968 came within that mounting crisis and did not immediately remove Massamba-Debat. The struggle came to a head that summer when Massamba-Debat arrested Ngouabi in late July, provoking a military reaction that freed him, and on 4 September 1968 the army overthrew Massamba-Debat, leading within months to Ngouabi assuming the presidency and founding the Marxist Leninist Congolese Party of Labour.

Researched Details

Researched

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

Target identified in Coup Atlas research: President Alphonse Massamba-Debat weathered the May 1968 turmoil but was overthrown by the military that September
RESEARCHED NAME
Key figures
Alphonse Massamba-Debat (president of the Republic of the Congo, target)
Marien Ngouabi (military faction leader)

Sources

Members of the military attempted to overthrow Massamba-Debat's government after he tried to place the military under a single command, and tensions remained between his administration and the military through 1968.
SOURCE REVIEWED Wikipedia, Alphonse Massamba-Debat open source ↗
In July 1968 Massamba-Debat arrested Captain Ngouabi, dissolved the National Assembly and the Political Bureau of the MNR, and suspended the 1963 Constitution, provoking a confrontation.
SOURCE REVIEWED Wikipedia, Alphonse Massamba-Debat open source ↗
On 4 September 1968, following several days of violent clashes, Massamba-Debat's government was overthrown by the military who forced him to resign.
SOURCE REVIEWED Wikipedia, 1968 Republic of the Congo coup d'etat open source ↗
Alfred Raoul became acting head of state until January 1969, when Marien Ngouabi assumed control and later founded the Congolese Party of Labour.
SOURCE REVIEWED Wikipedia, 1968 Republic of the Congo coup d'etat open source ↗

Editorial Note

No discrete documentation of a coup attempt precisely on 13 May 1968 in Congo Brazzaville was found in accessible English sources this session; the entry records the dataset's coding and the verified context of the Massamba-Debat versus Ngouabi struggle that culminated in the September 1968 coup, with the specific 13 May event unconfirmed, flagged as context only. Follows the Congo Brazzaville 1966-06-27 record in batch 66.

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
48405131968

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

Outcome and Target

Coup Atlas research identifies the target as: President Alphonse Massamba-Debat weathered the May 1968 turmoil but was overthrown by the military that September.

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.

Chicago Tribune

“CONGO REPORTS MERCENARIES SEIZED IN PLOT,” May 15, 1968

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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