Coup Atlas Research Database
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14507221950AttemptedMilitary coup

Bolivia, 1950 — military coup attempt

Bolivia (BOL)South America, AmericasJuly 22, 1950

Event Summary

During July 1950 the conservative government of Bolivian President Mamerto Urriolagoitia suppressed a further series of rebellions, the latest in a chain of revolts the regime crushed through the sexenio as the outlawed MNR and radicalized labor pressed against it. The government had spent the first half of 1950 rolling from crisis to crisis: a state of siege declared in January after uncovering an MNR plot, communist and MNR risings put down in February and March, the banning of the Communist Party in April, and the deadly La Paz general strike clashes of 18 to 19 May. The July rebellions of 6 to 22 July were beaten in the same way, leaving Urriolagoitia in office.

His hard line held the oligarchic order together only until the May 1951 election, when the MNR's electoral victory drove him to hand power to a military junta rather than concede, the self-coup known as the Mamertazo.

Researched Details

Researched

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

Target identified in Coup Atlas research: President Mamerto Urriolagoitia survived the July rebellions unharmed and remained in office until his May 1951 self-coup handover
RESEARCHED NAME
Key figures
Mamerto Urriolagoitia (president of Bolivia, target)
MNR and labor opposition (recurrent rebels)
Victor Paz Estenssoro (exiled MNR leader)

Sources

The government suppressed several rebellions between July 6 and 22, 1950, part of a year of repeated risings that included a January MNR plot, communist rebellions on February 4 and March 26, the April banning of the Communist Party, and the May 18 to 19 La Paz clashes that killed 38.
SOURCE REVIEWED University of Central Arkansas DADM Project, Bolivia 1917 to present open source ↗
Urriolagoitia crushed a number of coup attempts and in 1950 issued decrees outlawing opposition parties and unions, imposing curfews, and shutting newspapers as he repressed the MNR led reform movement.
SOURCE REVIEWED Wikipedia, Mamerto Urriolagoitia open source ↗
His administration worried less about deviations from constitutional principles in putting down revolts and uprisings, being more prepared to meet force with force, with several bloody clashes during his tenure.
SOURCE REVIEWED U.S. State Department, FRUS 1951 vol. II open source ↗
After the MNR won a plurality in the May 6, 1951 election, Urriolagoitia resigned on May 16, 1951 and handed power to a junta of anti-MNR army officers under General Hugo Ballivian, which annulled the result, the self-coup known as the Mamertazo.
SOURCE REVIEWED Wikipedia, List of coups and coup attempts by country open source ↗

Editorial Note

Dataset date 22 July 1950 corresponds to the closing day of the 6 to 22 July rebellions documented by the UCA DADM chronology; specific leadership of this particular cluster is not named in accessible sources, flagged. Follows the La Paz revolt of 19 May 1950 enriched in batch 57 and precedes the 1951 Mamertazo and 1952 revolution in the dataset.

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
14507221950

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

Outcome and Target

Coup Atlas research identifies the target as: President Mamerto Urriolagoitia survived the July rebellions unharmed and remained in office until his May 1951 self-coup handover.

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

Powell and Thyne

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

New York Times

“ATTEMPT AT REVOLT IN BOLIVIA IS BEATEN,” July 23, 1950

Washington Post

“Bolivia Reports Suppression of Revolt Attempt,” July 23, 1950

Chicago Tribune

“BOLIVIA PUTS DOWN REVOLT; REPORT 2 KILLED,” July 23, 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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