Coup Atlas Research Database
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23504081961ConspiracyMilitary coup

Portugal, 1961 — military coup conspiracy

Portugal (PRT)Southern Europe, EuropeApril 8, 1961

Event Summary

On 8 April 1961 General Julio Botelho Moniz, the Portuguese Minister of National Defence, led an aborted attempt to remove Antonio de Oliveira Salazar from the head of government. Known as the Abrilada of 1961, it drew in senior figures of the military hierarchy and the Army General Staff, and aimed at replacing Salazar with a view to reforming the regime's rigid colonial policy after the outbreak of war in Angola in early 1961 and the election of John F. Kennedy in the United States.

Botelho Moniz, who had been military attache in Washington, had tried to convince Salazar to change course and, failing that, turned to President Americo Tomas to dismiss the prime minister; Tomas refused. The plot was ill prepared, which allowed Salazar to react promptly, dismiss Botelho Moniz, and reassert control. It was the last significant attempt at military intervention in Portuguese political life before the 1974 Carnation Revolution.

A separate civil and military rising, the Beja revolt, followed at the end of December 1961.

Researched Details

Researched

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

Target identified in Coup Atlas research: Salazar remained in office and dismissed Botelho Moniz; he ruled until a stroke in 1968
RESEARCHED NAME
Key figures
Antonio de Oliveira Salazar (prime minister, target)
General Julio Botelho Moniz (defence minister, coup leader)
President Americo Tomas (head of state who refused to dismiss Salazar)

Sources

On 8 April 1961 Botelho Moniz was a prominent participant in an aborted coup to overthrow Salazar, supported by former President Craveiro Lopes and other colleagues.
SOURCE REVIEWED Wikipedia: Julio Botelho Moniz open source ↗
The attempt failed because it was ill prepared, enabling Salazar to react promptly and remove Botelho Moniz.
SOURCE REVIEWED Wikipedia: Julio Botelho Moniz open source ↗
The plot, called the Abrilada of 1961, aimed to overthrow both Salazar and President Americo Tomas and was the last significant military intervention attempt before 1974.
SOURCE REVIEWED Researchgate: Military officers and politics, Abrilada 1961 open source ↗
The Portuguese account dates the constitutional coup attempt to 11-12 April 1961 and links it to Botelho Moniz's exposure in Washington to the unsustainability of colonial policy and the election of Kennedy.
SOURCE REVIEWED Wikipedia PT: Golpe Botelho Moniz open source ↗

Editorial Note

Coded date 8 Apr 1961 matches the English sourcing for the Botelho Moniz coup; Portuguese sources place the constitutional coup attempt on 11-12 April. Near exact match. Distinct from the later Beja revolt of 31 Dec 1961 to 1 Jan 1962.

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
23504081961

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

Outcome and Target

Coup Atlas research identifies the target as: Salazar remained in office and dismissed Botelho Moniz; he ruled until a stroke in 1968.

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

New York Times

“Portuguese Trial Adjourned,” July 7, 1960

Manchester Guardian

“31 arrests in Portugal: PLOT TO ’ALTER PUBLIC ORDER’,” May 8, 1959

Washington Post and Times Herald

“Plot to Upset Salazar Smashed, Portugal Says: Rumors Confirmed,” May 8, 1959

Christian Science Monitor

“Portugal Says Plot Crushed in March: Silence Explained,” May 7, 1959

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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