The Battle of Pavón, a key battle of the Argentine Civil Wars, was fought in Pavón, Santa Fé Province, Argentina on 17 September 1861 between the Army of the State of Buenos Aires (commanded by Bartolomé Mitre) and the Army of Republic of the Argentine Confederation (commanded by Justo José de Urquiza). The withdrawal of Urquiza left the field to Mitre.
The victory led to the dissolution of the national government and the reincorporation of Buenos Aires Province into the Argentine Republic as a dominant member of the nation. Governor Bartolomé Mitre would act as interim president, ratified by the National Congress, and then as the first president of a unified Argentine Republic.
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