Argentina (ARG)South America, AmericasNovember 13, 1955
Event Summary
On November 13, 1955, less than two months after taking power in the Revolucion Libertadora, Argentina's provisional president General Eduardo Lonardi was removed in an internal palace coup and replaced by General Pedro Eugenio Aramburu. Lonardi, who led the Catholic-nationalist wing of the anti-Peron movement, had struck a conciliatory tone toward Peronists, promising there would be neither victors nor vanquished. That approach angered the liberal, hardline wing of the officer corps, led by Aramburu and Admiral Isaac Rojas, who wanted a far more aggressive de-Peronization.
They deposed Lonardi from within the ruling junta and installed Aramburu as president. His government banned the Peronist party outright, repealed the 1949 constitution, and later carried out executions of Peronist rebels, giving the regime the name Revolucion Fusiladora among its opponents.
Researched Details
Researched
Independent research, added record by record. Hover any label for what it means.
Target identified in Coup Atlas research: Eduardo Lonardi, provisional President of Argentina (deposed in an internal coup; not physically harmed)
RESEARCHED NAME
Key figures
Eduardo Lonardi (deposed provisional president)
Pedro Eugenio Aramburu (general who took the presidency)
Isaac Rojas (admiral, hardline vice president)
Sources
Lonardi's conciliatory tone earned him the opposition of hard-liners, and in November an internal coup deposed him and placed General Aramburu in the presidency, giving rise to an aggressive anti-Peronism.
Major General Eduardo 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 claiming the title of President of the Nation.
SOURCE REVIEWEDHelion & Company / Antonio Luis Sapienza Fracchia, "Revolucion Libertadora Volume 1"open source ↗
The coup group was divided between a Catholic-nationalist part led by Lonardi, who took charge initially, and a liberal-conservative part led by Aramburu and Admiral Rojas.
SOURCE REVIEWEDWikipedia, "Military coups in Argentina"open source ↗
Aramburu repealed the existing national constitution by military proclamation, restoring the 1853 text, and his regime carried out executions of Peronist military and civilians, actions that led opponents to call it the Revolucion Fusiladora.
Sources agree Lonardi was replaced by Aramburu on 13 November 1955 (the Cline dataset date) in an internal palace coup, matching the dataset's coding of the leader deposed but not physically harmed. Two Wikipedia articles and a published military history were read directly. This is the direct sequel to the September 1955 Revolucion Libertadora record.
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: Eduardo Lonardi, provisional President of Argentina (deposed in an internal coup; not physically harmed).
Baseline coding: Incumbent executive removed from power. Recorded leader fate: deposed; 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
“Argentine Chief Held Democratic, Gen. Aramburu, 36 Years in the Army...,” November 14, 1955
“New Junta Takes Argentine Rule; Lonardi Defies It,” by Edward A. Morrow, November 14, 1955
“Argentine Plans Elections Parley,” July 7, 1956.
“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 →