Coup Atlas Research Database
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35502261950ConspiracyMilitary coup

Bulgaria, 1950 — military coup conspiracy

Bulgaria (BGR)Eastern Europe, EuropeFebruary 26, 1950

Event Summary

The dataset records an event coded as a military or palace coup conspiracy in Bulgaria on 26 February 1950, during the intense purge that followed the treason trial and execution of Traicho Kostov, the former deputy prime minister and party secretary hanged in December 1949 for an alleged Titoist and Western-backed conspiracy to overthrow the government. Kostov's fall, part of the Stalinist anti-Titoist campaign across the bloc, was followed in 1950 and 1951 by a wave of further trials against alleged Kostovites, during which more than thirty prominent communists were sentenced. This was also the period in which power passed to the hardline Stalinist Vulko Chervenkov, Bulgaria's Little Stalin, after the deaths of Georgi Dimitrov in July 1949 and Vasil Kolarov in early 1950.

No discrete documentation of a distinct coup plot precisely on 26 February 1950 appears in accessible English sources, but the period was one of pervasive conspiracy accusations and purges within the party and state apparatus.

Researched Details

Researched

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

Target identified in Coup Atlas research: The communist leadership consolidated under Vulko Chervenkov; the Kostovite purges continued through 1950 and 1951
RESEARCHED NAME
Key figures
Vulko Chervenkov (incoming Stalinist party leader)
Traicho Kostov (executed December 1949 for an alleged conspiracy)
Alleged Kostovites (targets of the 1950 to 1951 purges)

Sources

Traicho Kostov was tried in Sofia from 7 to 14 December 1949 and executed on 16 December, convicted of organizing an underground center aiming to overthrow the government by violence with British, American, and Yugoslav backing.
SOURCE REVIEWED Wikipedia, Traicho Kostov open source ↗
Kostov's execution was followed in 1950 and 1951 by several other trials against his adherents, during which more than thirty prominent communists were sentenced to long imprisonment.
SOURCE REVIEWED Wikipedia, Traicho Kostov open source ↗
Dimitrov died in office in July 1949 and was succeeded by Vasil Kolarov, who died in early 1950, after which power passed to the Stalinist Vulko Chervenkov.
SOURCE REVIEWED Britannica, Bulgaria: The early communist era open source ↗
Chervenkov, known as Bulgaria's Little Stalin, relied heavily on the police and security apparatus and pursued Soviet-model policies.
SOURCE REVIEWED Britannica, Bulgaria: The early communist era open source ↗

Editorial Note

No discrete documentation of a coup plot precisely on 26 February 1950 in Bulgaria was found in accessible English sources this session; the entry records the dataset's coding and the verified context of the Kostovite purge trials and the Chervenkov consolidation, with the specific plot unconfirmed and flagged as context only. First Bulgaria 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
35502261950

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

Outcome and Target

Coup Atlas research identifies the target as: The communist leadership consolidated under Vulko Chervenkov; the Kostovite purges continued through 1950 and 1951.

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

South China Morning Post

“Unsuccessful Coup: Report of Arrest of Bulgarian Army Chief-of-Staff Dimitrov Allegedly Killed,” February 28, 1950

The Sun

“Coup Failed in Bulgaria, Paper Says: Spiked by Soviet Police After Dimitrov Death, Berline Hears,” February 27, 1950

Times of India

“Reported Bid To Overthrow Bulgarian Government: High Army Officers Arrested,”February 28,1950

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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