Coup Atlas Research Database
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23510101950ConspiracyDissident coup

Portugal, 1950 — dissident coup conspiracy

Portugal (PRT)Southern Europe, EuropeOctober 10, 1950

Event Summary

The dataset records an event coded as a dissident coup conspiracy in Portugal on 10 October 1950, during the entrenched Estado Novo dictatorship of Antonio de Oliveira Salazar. In the immediate postwar years Salazar had allowed a brief liberalization, permitting the opposition Movement of Democratic Unity to form in 1945, but as the movement came under communist influence the regime outlawed it in 1948 and reinstated the restrictions on civil liberties, relying on the PIDE secret police to suppress dissent. Portugal had become a founding member of NATO in 1949 as an anti-communist ally despite being the alliance's only non-democratic founder.

No discrete documentation of a distinct coup plot precisely on 10 October 1950 appears in accessible English sources; the best-documented anti-Salazar conspiracies came later, including the 1959 Cathedral Coup, the 1961 Beja barracks uprising, and ultimately the 1974 Carnation Revolution that ended the dictatorship. The coded 1950 event is thin, reflecting the clandestine opposition and communist underground activity of the period.

Researched Details

Researched

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

Target identified in Coup Atlas research: Prime Minister Antonio Salazar's Estado Novo regime remained firmly in power; it fell only in 1974
RESEARCHED NAME
Key figures
Antonio de Oliveira Salazar (dictator of Portugal, target)
PIDE secret police (regime enforcement)
Clandestine communist and democratic opposition

Sources

Salazar permitted the formation of the Movement of Democratic Unity in 1945, but it came under Communist Party influence and was outlawed by the government in 1948.
SOURCE REVIEWED Wikipedia, Antonio de Oliveira Salazar open source ↗
In 1949 Portugal became a founding member of NATO, a reflection of its role as an anti-communist ally despite being the alliance's only non-democratic founder.
SOURCE REVIEWED Wikipedia, Antonio de Oliveira Salazar open source ↗
The Estado Novo relied on the PIDE secret police from 1945, which detained, tortured, and killed those suspected of opposition to the regime.
SOURCE REVIEWED Portugal.com, Salazar's Estado Novo open source ↗
Better-documented anti-Salazar plots came later, including the 1959 Cathedral Coup by army officers and the 1961 Beja barracks uprising.
SOURCE REVIEWED Portugal Resident, Opposition to Salazar's Regime open source ↗

Editorial Note

No discrete documentation of a coup plot precisely on 10 October 1950 in Portugal was found in accessible English sources this session; the entry records the dataset's coding and the verified context of the entrenched Estado Novo and its clandestine opposition, with the specific plot unconfirmed and flagged as context only. First Portugal record in the dataset 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
23510101950

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

Outcome and Target

Coup Atlas research identifies the target as: Prime Minister Antonio Salazar's Estado Novo regime remained firmly in power; it fell only in 1974.

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

“Seven Face Lisbon Plot Trial,” October 10, 1950

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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