Coup Atlas Research Database
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31511201951ConspiracyDissident coup

Czechoslovakia, 1951 — dissident coup conspiracy

Czechoslovakia (CSK)Eastern Europe, EuropeNovember 20, 1951

Event Summary

The dataset records an event coded as a dissident coup conspiracy in Czechoslovakia on 20 November 1951, coinciding with the arrest of Rudolf Slansky, the general secretary and second most powerful figure in the Communist Party. As part of Stalin's bloc-wide purge of alleged Titoists after the Tito-Stalin split, President Klement Gottwald, fearing for his own position, sacrificed his longtime friend and deputy. Slansky was arrested in late November 1951, following the delivery of the so-called Great Sweeper letter around 11 November and the arrival of a new Soviet ambassador on 15 November, and charged with organizing an anti-state Titoist and Zionist conspiratorial center that plotted to assassinate Gottwald and overthrow the regime with American and British backing.

Dozens of other leading communists were detained in the same period. Slansky and thirteen co-defendants were tried in November 1952, and eleven, including Slansky, were executed on 3 December 1952. The conspiracy charge was later admitted to be a fabrication.

Researched Details

Researched

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

Target identified in Coup Atlas research: President Klement Gottwald consolidated power; Slansky was executed as the alleged conspiracy ringleader
RESEARCHED NAME
Key figures
Klement Gottwald (communist president, orchestrator)
Rudolf Slansky (party secretary general, arrested as alleged plot leader)
Soviet advisors (directing the purge)

Sources

Slansky was arrested in late November 1951 and charged with having organized a Titoist conspiratorial center and being the ringleader of a plot to assassinate Gottwald and overthrow the regime with American and British assistance.
SOURCE REVIEWED Encyclopedia.com, Rudolf Salzmann Slansky open source ↗
Fearing arrest and death amid Stalin's purges of the satellite parties, Gottwald decided to sacrifice his best friend Slansky to save himself.
SOURCE REVIEWED Wikipedia, Rudolf Slansky open source ↗
In the months before and after the arrest, dozens of other leading communist officials were detained, tortured, and forced to confess to fabricated crimes against the party and state.
SOURCE REVIEWED Encyclopedia.com, Slansky Trial open source ↗
Slansky and thirteen others were tried in November 1952; eleven were executed on 3 December 1952, and the anti-state conspiracy charge was later admitted to be a fabrication.
SOURCE REVIEWED Wikipedia, Slansky trial open source ↗

Editorial Note

The coded 20 November 1951 aligns with the Slansky arrest window (sources give 23 to 27 November for the arrest and announcement, with the Great Sweeper letter around 11 November and the new Soviet ambassador on 15 November). Well documented as the fabricated Slansky conspiracy affair. This is the culmination of the pre-Slansky intra-party purge flagged in the 25 February 1951 Czechoslovakia record from batch 2.

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
31511201951

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

Outcome and Target

Coup Atlas research identifies the target as: President Klement Gottwald consolidated power; Slansky was executed as the alleged conspiracy ringleader.

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

Wikipedia

The Sun

“CZECHS JAIL KEY PURGER: S Lansky Removed From Vice Premiership And Parliament,” November 28, 1951

New York Times

“SLANSKY ACCUSED AS CZECH TITOIST: Gottwald Says Jailed Red Was American Agent, Caught Fleeing to the West SLANSKY ACCUSED AS CZECH TITOIST,” December 8, 1951

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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