Coup Atlas Research Database
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31503181950ConspiracyDissident coup

Czechoslovakia, 1950 — dissident coup conspiracy

Czechoslovakia (CSK)Eastern Europe, EuropeMarch 18, 1950

Event Summary

The dataset records an event coded as a dissident coup conspiracy in Czechoslovakia on 18 March 1950, during the wave of political trials by which the Communist government of Klement Gottwald consolidated its rule after the February 1948 coup. The most prominent of the 1950 trials was that of the non-communist democratic politician Milada Horakova and twelve co-defendants, accused of leading a subversive conspiracy against the republic; the trial was held in mid-1950 and Horakova was executed on 27 June 1950. The coded March 1950 date falls in the run-up to that trial, amid the broader prosecution of alleged anti-state conspiratorial centers as the regime crushed the remnants of non-communist opposition.

This period preceded the later intra-party Slansky purge, in which the party turned on its own leaders. No discrete documentation of a distinct plot precisely on 18 March 1950 appears in accessible English sources, but it fits the pattern of fabricated conspiracy prosecutions of that year.

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 crushed the non-communist opposition through the 1950 political trials
RESEARCHED NAME
Key figures
Klement Gottwald (communist president of Czechoslovakia)
Milada Horakova (democratic politician executed in the leading 1950 conspiracy trial)
Non-communist opposition (targets of the trials)

Sources

The Gottwald regime staged the Milada Horakova trial in mid-1950, accusing the democratic politician and her co-defendants of a subversive conspiracy against the republic; she was executed on 27 June 1950.
SOURCE REVIEWED Mark Baker Prague, Czechoslovakia's Sham Show Trial open source ↗
The February 1948 coup by the Communist Party ended Czechoslovakia's limited postwar democracy and was followed by sweeping purges and show trials.
SOURCE REVIEWED Wikipedia, Slansky trial open source ↗
Many political trials followed through the early 1950s, sending innocent victims to jail and hard labour in the Jachymov uranium mines and labour camps.
SOURCE REVIEWED Wikipedia, Slansky trial open source ↗
The later intra-party Slansky purge did not begin in earnest until 1951, when the party turned on its own leaders.
SOURCE REVIEWED Wikipedia, Rudolf Slansky open source ↗

Editorial Note

No discrete documentation of a coup plot precisely on 18 March 1950 in Czechoslovakia was found in accessible English sources this session; the entry records the dataset's coding and the verified context of the 1950 political trials, most prominently the Horakova conspiracy trial, with the specific plot unconfirmed and flagged as context only. The February 1948 coup and the 1951-52 Slansky affair are separate events.

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
31503181950

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

Outcome and Target

Coup Atlas research identifies the target as: The Gottwald regime crushed the non-communist opposition through the 1950 political trials.

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.

New York Times

“CZECH REGIME TRIES 10 RANKING CLERICS: Two Abbots And Head Of Jesuit Order In Group Accused of Plot Against Prague PRAGUE IS TRYING TEN HIGH CLERICS Roles Alleged in Plot Anti-Regime Sermons,” April 1, 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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