On 27 August 1949 the outlawed MNR launched the Bolivian civil war of 1949, an armed uprising in four cities against the conservative PURS government of the ailing President Enrique Hertzog, in which Vice President Mamerto Urriolagoitia was increasingly the governing hand. Coming on the heels of the May 1949 Siglo XX mine conflict and massacre, the rebels, backed by workers and some military officers, seized most major cities except La Paz, set up a revolutionary government in Santa Cruz under Edmundo Roca, and proclaimed the exiled Victor Paz Estenssoro president. The army under General Ovidio Quiroga counterattacked with bomber support, retaking Cochabamba and then Santa Cruz, and by 1 September the government had regained control, with insurgent leaders shot or fleeing by mid-September.
The failed insurrection became the strategic dress rehearsal for the MNR's victorious April 1952 revolution.
Researched Details
Researched
Independent research, added record by record. Hover any label for what it means.
Target identified in Coup Atlas research: The PURS government survived; President Enrique Hertzog resigned for health reasons weeks later and Vice President Urriolagoitia constitutionally succeeded him in October 1949
RESEARCHED NAME
Key figures
Enrique Hertzog (president of Bolivia, target)
Mamerto Urriolagoitia (vice president and successor)
Victor Paz Estenssoro (exiled MNR leader proclaimed president by the rebels)
Edmundo Roca (head of the rebel government in Santa Cruz)
Ovidio Quiroga (general who crushed the rising)
Sources
On 27 August 1949 the civil war broke out with the MNR leading an uprising in four Bolivian cities, and within days a revolutionary government emerged in Santa Cruz led by Edmundo Roca, with the revolution proclaiming the exiled Paz Estenssoro president; the army under General Ovidio Quiroga retook Cochabamba and Santa Cruz with bomber aircraft, and by 1 September the government had retaken control.
SOURCE REVIEWEDWikipedia, Bolivian National Revolutionopen source ↗
Under Paz Estenssoro's leadership from exile in Argentina, the MNR unsuccessfully attempted to gain power amid the unrest in the tin mines, gaining control of most major cities except La Paz with the support of workers and some military officers before the army defeated the rebels in September 1949.
SOURCE REVIEWEDOnWar, Civil War in Bolivia 1949open source ↗
Bolivia's ambassador on special mission described the rebellion to Washington as an assault the under equipped but loyal army barely withstood, part of what La Paz saw as a larger Argentine backed plot, with President Urriolagoitia convinced they had won a battle but not the war.
SOURCE REVIEWEDU.S. State Department, FRUS 1949 vol. IIopen source ↗
The 1949 insurrection known as the civil war saw MNR rebels seize the provincial capitals but lose the struggle for La Paz and ultimately the war, a well-known precedent for the elaborately planned April 1952 insurrection that succeeded.
SOURCE REVIEWEDHispanic American Historical Review (Duke University Press)open source ↗
Editorial Note
Exact date match for the 27 August outbreak. Leadership context noted: Hertzog was president in name through the war but resigned soon after, with Urriolagoitia assuming office on 24 October 1949; sources differ on how early Urriolagoitia effectively governed. Links to the Villarroel records, the 1950 La Paz revolt in this batch, the 1951 Mamertazo, and the successful 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:
Coup Atlas research identifies the target as: The PURS government survived; President Enrique Hertzog resigned for health reasons weeks later and Vice President Urriolagoitia constitutionally succeeded him in October 1949.
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
New York Times
“Bolivian Rebels Get Army Ultimatum, Warned to Surrender or Face Annihilation at Cochabamba, Reported Surrounded,” August 29, 1949
“Bolivian Loyalists Retake Rebel City,” August 31, 1949
The Washington Post
“Bolivian Rebels Seize Capital of Province, Enter 2d Key City,” August 28, 1949
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 →