Coup Atlas Research Database
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31502251951ConspiracyDissident coup

Czechoslovakia, 1951 — dissident coup conspiracy

Czechoslovakia (CSK)Eastern Europe, EuropeFebruary 25, 1951

Event Summary

The dataset records an event coded as a dissident coup conspiracy in Czechoslovakia on 25 February 1951, the third anniversary of the February 1948 communist seizure of power, during the intra-party purge that would culminate in the Slansky show trial. Through late 1950 and early 1951 a special secret-police unit under Karel Svab, guided by Soviet advisors, worked to uncover alleged anti-state conspiratorial elements within the Communist Party itself. The Sling affair, in which the regional party secretary Otto Sling was accused under torture of plotting to overthrow party secretary general Rudolf Slansky and replace him with Marie Svermova, and the arrest of high-ranking communists including Foreign Minister Vladimir Clementis, unfolded in this period.

Slansky himself was not arrested until November 1951 and was executed with ten co-defendants in December 1952. No discrete documentation of a distinct plot precisely on 25 February 1951 appears in accessible English sources, but it fits the pattern of the fabricated anti-state conspiratorial center prosecutions of the pre-Slansky purge.

Researched Details

Researched

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

Target identified in Coup Atlas research: The Gottwald regime pursued the intra-party purge that led to the Slansky trial; the party leadership held power throughout
RESEARCHED NAME
Key figures
Klement Gottwald (communist president of Czechoslovakia)
Rudolf Slansky (party secretary general, later purged)
Karel Svab (secret-police unit head uncovering alleged conspirators)

Sources

The Czechoslovak secret police established a special unit headed by Karel Svab to uncover anti-state elements within the party.
SOURCE REVIEWED Encyclopedia.com, Slansky Trial open source ↗
Under torture Otto Sling confessed to a plot to overthrow Slansky and replace him with Marie Svermova, and high-ranking communists including Foreign Minister Vladimir Clementis were arrested.
SOURCE REVIEWED Encyclopedia.com, Slansky Trial open source ↗
Slansky was not arrested until 24 November 1951 and was tried with thirteen others in November 1952, charged with leading an anti-state conspiratorial center.
SOURCE REVIEWED Encyclopedia.com, Slansky Trial open source ↗
Eleven of the fourteen Slansky-trial defendants were executed in Prague on 3 December 1952.
SOURCE REVIEWED Grokipedia, Slansky trial open source ↗

Editorial Note

No discrete documentation of a coup plot precisely on 25 February 1951 in Czechoslovakia was found in accessible English sources this session; the coded date is the third anniversary of the February 1948 coup and falls in the pre-Slansky intra-party purge, which the entry records as verified context with the specific plot flagged as context only. Distinct from the 18 March 1950 Czechoslovakia record in this batch.

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
31502251951

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

Outcome and Target

Coup Atlas research identifies the target as: The Gottwald regime pursued the intra-party purge that led to the Slansky trial; the party leadership held power throughout.

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

CSP

Named in the baseline source document; no article citation was recorded.

The Guardian

“Lurid charges against deposed Czech leaders,” February 28, 1951

New York Times

“Clements seized as spy by Czechs,” February 27, 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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