1866 in Argentina

Incumbents

• President: Bartolomé Mitre
• Vice President: Marcos Paz

Events

• January 31 – Paraguayan War: The Battle of Pehuajó takes place when about 1500 Paraguayan troops, commanded by General Francisco Isidoro Resquín and Lieutenant Celestino Prieto, engage in a surprise attack Argentinian and Uruguayan battalions with around 2000 men, led by General Emilio Conesa; the Paraguayans are successful and the joint Argentine-Uruguayan force suffers heavy casualties.^[1]
• May 24 – Paraguayan War: First Battle of Tuyutí is an allied victory.^[2]
• July 18 – Battle of Boquerón (1866)
• September 1–3 – Battle of Curuzú
• September 22 – Battle of Curupayty

Deaths

• February 15 – Juan Gregorio de las Heras, military leader (born 1780)

References

1. O'Leary, Juan; El Libro de los Héroes; Editorial Servilibro; Asunción, Paraguay (2007)
2. Williams, John Hoyt (2000), "A Swamp of Blood: The Battle of Tuyuti", Military History 17 (1): 58–64.