Coup Atlas Research Database
← Back to explorer
35005311951AttemptedMilitary coup

Greece, 1951 — military coup attempt

Greece (GRC)Southern Europe, EuropeMay 31, 1951

Event Summary

On 31 May 1951 a group of right-wing officers of the secret military society IDEA, the Sacred Bond of Greek Officers, staged an abortive coup in Athens, occupying the General Staff building, the radio station, and other key points. The rising was triggered by the resignation of Field Marshal Alexandros Papagos, the victorious civil war commander, who stepped down from his army command to enter politics; his departure alarmed IDEA officers whose charter pledged to impose a dictatorship if civilian leaders failed to contain communism. The movement collapsed within a day when Papagos himself intervened to end it, a demonstration that he retained the loyalty of the armed forces.

The coup left the constitutional government intact, and IDEA's grip on the army only tightened after Papagos won the November 1952 election, when officers disciplined for the attempt were rewarded with senior posts.

Researched Details

Researched

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

Target identified in Coup Atlas research: The Greek government survived the IDEA coup intact; it was ended within a day by Papagos's intervention
RESEARCHED NAME
Key figures
The Plastiras and Venizelos coalition government (target)
IDEA, the Sacred Bond of Greek Officers (plotters)
Alexandros Papagos (field marshal whose resignation triggered the rising and who ended it)

Sources

On 31 May 1951 right-wing officers of the Sacred Link of Greek Officers, IDEA, staged an attempted coup d'etat.
SOURCE REVIEWED Wikipedia, List of Greek coups d'etat open source ↗
Papagos resigned his post in May 1951, and his resignation caused IDEA members, whose charter said they should establish a dictatorship if political leaders could not contain communism, to occupy the General Staff building, the radio station, and other places in Athens; the movement ended within a day by Papagos's intervention, proving he was in full control of the armed forces.
SOURCE REVIEWED History Is Now Magazine, The Modern Greek State 1950 to 1974 open source ↗
The most important effect of the Greek Rally's later electoral victory was that it consolidated IDEA's hold on the army, and officers disciplined for their part in the attempted coup of 1951 received more important posts than before.
SOURCE REVIEWED Commentary Magazine, What Happened in Greece open source ↗
The U.S. State Department recorded the aborted coup by military officers belonging to IDEA on May 31, 1951, in its foreign relations series.
SOURCE REVIEWED U.S. State Department, FRUS 1952 to 1954 vol. VIII open source ↗

Editorial Note

Exact date match. IDEA reappears in the dataset as the officer network behind the 1967 Colonels' coup. Greece was in a period of severe governmental instability during 1950 and 1951 before Papagos became prime minister in 1952.

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
35005311951

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

Outcome and Target

Coup Atlas research identifies the target as: The Greek government survived the IDEA coup intact; it was ended within a day by Papagos's intervention.

Baseline coding: Coup attempt failed to remove the incumbent. 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.

Wikipedia

Detroit Free Press

“Attempted Revolution Reported in Greece,” June 1, 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 →

Know something about this event?
Tips are reviewed against sources before anything is added.