Coup Atlas Research Database
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15510311975ConspiracyDissident coup

Chile, 1975 — dissident coup conspiracy

Chile (CHL)South America, AmericasOctober 31, 1975

Event Summary

This entry is coded 31 October 1975, during the peak of repression under Augusto Pinochet's military dictatorship in Chile, two years after the September 1973 coup that overthrew Salvador Allende. By late 1975 Pinochet had consolidated one-man rule, having been named Supreme Head of the nation in December 1974 over the objection of Air Force General Gustavo Leigh, and was suppressing both leftist opposition and internal military dissent. The secret police, DINA, under Manuel Contreras and answering directly to Pinochet, was responsible for the majority of secret arrests, torture, and disappearances, and was mounting transnational assassination operations against exiled opponents, including the September 1974 car-bomb killing of General Carlos Prats in Buenos Aires and the October 1975 shooting of Christian Democrat Bernardo Leighton in Rome.

Operation Condor, the coordinated regional campaign of the Southern Cone secret police agencies, was formally founded at the Pinochet regime's behest in late November 1975. The October 1975 coding sits in this period of DINA-driven repression and internal military tension within the junta.

Researched Details

Researched

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

Target identified in Coup Atlas research: Pinochet held power and consolidated his dictatorship, which lasted until 1990
RESEARCHED NAME
Key figures
General Augusto Pinochet (military dictator)
DINA and its director Manuel Contreras (the secret police)
General Gustavo Leigh (junta rival who opposed Pinochet's supremacy)

Sources

In December 1974 the ruling military junta appointed Pinochet Supreme Head of the nation, although without the support of one of the coup's instigators, Air Force general Gustavo Leigh.
SOURCE REVIEWED Wikipedia: Augusto Pinochet open source ↗
During the first three years of the dictatorship, DINA was responsible for the majority of secret arrests, cases of torture and disappearances committed by the regime.
SOURCE REVIEWED National Security Archive: The Pinochet Regime Declassified open source ↗
Operation Condor, a U.S.-supported terror operation focusing on South America, was founded at the behest of the Pinochet regime in late November 1975.
SOURCE REVIEWED Wikipedia: Augusto Pinochet open source ↗
In September 1975 former Christian Democrat vice president Bernardo Leighton and his wife were gunned down on the streets of Rome by a DINA-contracted operative, both surviving with crippling injuries.
SOURCE REVIEWED National Security Archive: The Pinochet Regime Declassified open source ↗

Editorial Note

No discrete plot is precisely dated 31 Oct 1975 in the sources located this session; the coding sits in the late-1975 period of DINA-driven repression, transnational assassinations, and internal junta tension as Pinochet consolidated one-man rule ahead of Operation Condor's late-November founding. Context with strong framing. First Chile 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
15510311975

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

Outcome and Target

Coup Atlas research identifies the target as: Pinochet held power and consolidated his dictatorship, which lasted until 1990.

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

“CHILE SAYS A PLOT BY LEFT IS BROKEN,” November 1, 1975
“Chile reports 14 leftists held; guerrilla infiltration plot found,” November 11, 1975

Washington Post

“Chile says it foiled plot,” November 12, 1975

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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