1864 in Argentina
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Incumbents
Governors
- Buenos Aires Province: Mariano Saavedra
- Cordoba: Roque Ferreyra (starting month unknown)
- Mendoza Province: Carlos González
- Santa Fe Province: Patricio Cullen
Vice Governors
- Buenos Aires Province: vacant
Events
- 10 August â Uruguayan War: War breaks out between Brazil and Uruguay, despite negotiations involving Argentine Foreign Minister Rufino de Elizalde.[1]
- 25 October â establishment of General Las Heras Partido
- 13 December â Paraguayan War: Paraguay declares war on Brazil; war with Argentina follows three months later.[2]
- The classic aperitif Hesperidina is invented by American immigrant Melville Sewell Bagley in Buenos Aires.[3]
Deaths
- 30 October â Jonas Coe ("Comodoro Juan Coe"), US naval commander and supporter of Juan Manuel de Rosas (born 1805).[4]