Events in the year 1852 in Argentina.
Incumbents Governor of Buenos Aires Province: Juan Manuel de Rosas (de facto Head of State of Argentina Governor of Cordoba: Manuel López then Alejo Carmen Guzmán Governor of Santa Fe Province: Domingo Crespo Provisional Director of the Argentine Confederation: Justo José de Urquiza
Events January 29 – Platine War: Battle of Alvarez Field. 4,000 Rosas loyalist Argentine troops led two of General Ángel Pacheco's colonel defeated by anti-Rosas forces. January 31 – Two anti-Rosas divisions defeat Pacheco's forces at the Battle of Marques Bridge February 1 – anti-Rosas coalition camps 9 km (5.6 mi) from Buenos Aires February 2 – brief skirmish between anti-Rosas coalition and Rosas loyalists end with loyalists retreat February 3 – Platine War: Battle of Caseros. Rosas overthrown and exiled from Argentina February 4 – surviving soldiers of Regimento Aquino, composed of Rosas loyalists who had defected from anti-Rosas coalition, summarily executed by firing squad February 20 – Brazilian forces, part of victorious anti-Rosas coalition, parade through Buenos Aires to mark 25th anniversary of Battle of Ituzaingó in Cisplatine War May 31 – San Nicolás Agreement September 11 – coup d'etat in Argentina; Buenos Aires Province declares independence. Yellow fever in Buenos Aires epidemic
Deaths February 4 – Martiniano Chilavert, former Unitarian turned Rosas loyalist, executed by firing squad
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