Argentina (ARG)South America, AmericasSeptember 16, 1955
Event Summary
On September 16, 1955, a military and civilian uprising known as the Revolucion Libertadora overthrew President Juan Domingo Peron of Argentina, ending his rule after nearly a decade in power. Peron had lost the backing of much of the armed forces, the Catholic Church, and opposition parties amid economic troubles, his conflict with the Church, and growing authoritarianism; earlier in 1955 navy and air force aircraft had even bombed a pro-Peron crowd in the Plaza de Mayo. Rebel forces centered on Cordoba under General Eduardo Lonardi, with Generals Aramburu and Admiral Rojas, rose against the government.
To avoid a full civil war Peron resigned around September 19 and took asylum aboard a Paraguayan gunboat, beginning a long exile. Lonardi was sworn in as provisional president on September 23, promising reconciliation, and the Peronist party was banned for years afterward.
Researched Details
Researched
Independent research, added record by record. Hover any label for what it means.
Target identified in Coup Atlas research: Juan Domingo Peron, President of Argentina (overthrown, resigned, went into exile)
RESEARCHED NAME
Key figures
Juan Domingo Peron (deposed president)
Eduardo Lonardi (coup leader, became provisional president)
Pedro Eugenio Aramburu (coup general)
Isaac Rojas (admiral, coup leader)
Sources
The Revolucion Libertadora was the civic-military dictatorship that ruled Argentina after overthrowing President Juan Domingo Peron through a coup that began on 16 September 1955, shutting down Congress and removing the Supreme Court.
On 16 September 1955 an uprising led by General Eduardo Lonardi, General Pedro Aramburu, and Admiral Isaac Rojas deposed Peron and established a provisional government, with fighting in Cordoba and at naval bases.
Realizing the extent of the opposition, Peron resigned on 19 September 1955 to avoid further bloodshed and sought asylum in Paraguay before moving to other countries in exile.
SOURCE REVIEWEDHistoryCentral, "1955 Military Coup Ousts Peron"open source ↗
Lonardi, leader of the coup, took office on 23 September 1955 and was replaced on 13 November by Pedro Eugenio Aramburu through a palace coup; both claimed the title of President of the Nation.
SOURCE REVIEWEDHelion & Company / Antonio Luis Sapienza Fracchia, "Revolucion Libertadora Volume 1"open source ↗
Editorial Note
Sources agree the coup began 16 September 1955 (the Cline dataset date), Peron resigned around 19 September and went into exile, and Lonardi was sworn in on 23 September; the dataset's leader fate of fleeing the country matches Peron's asylum. Two Wikipedia sections, HistoryCentral, and a published military history were read directly. This record pairs with the November 1955 Argentina record, when Lonardi himself was ousted by Aramburu.
Cross-Reference
Datasets agree. At least two of the three reference datasets we check against carry this event, and none of them disagrees about its date or its result.
Identifiers for finding this same event in the other datasets:
Coup Atlas research identifies the target as: Juan Domingo Peron, President of Argentina (overthrown, resigned, went into exile).
Baseline coding: Incumbent executive removed from power. Recorded leader fate: deposed; fled the country. 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.
Luttwak
Named in the baseline source document; no article citation was recorded.
Powell and Thyne
Named in the baseline source document; no article citation was recorded.
Wikipedia
https://en.wikipedia.org/wiki/Revoluci%C3%B3n_Libertador A
New York Times
“Civil War Breaks out in Argentina; Military Units Rise Against Peron; Rebels,” by Edward A. Morrow, September 17, 1955
“Peron’s Regime is Overthrown; Junta will Meet with Rebels,” September 20, 1955
“Argentina Removes Army’s Commander,” by Edward A. Morrow, November 23, 1956
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 →