Stamp commemorating the centennial of the 1859 Pact of San José de Flores
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Date | November 11, 1859 |
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Location | Flores, Buenos Aires |
Also known as |
Pacto Unión San José de Flores Pacto de Unión Nacional |
Participants |
State of Buenos Aires: Juan Bautista Peña and Carlos Tejedor Argentine Confederation: Tomás Guido, Daniel Aráoz, and Juan Esteban Pedernera Mediator: Francisco Solano López (Paraguay). |
Outcome | Province of Buenos Aires readmitted into the Argentine Confederation. Agreement proved tentative until the 1861 Battle of Pavón affirmed Buenos Aires' position. |
The Pact of San José de Flores (Pacto Unión San José de Flores, or Pacto de Unión Nacional) was a treaty signed between the Argentine Confederation and the State of Buenos Aires on November 11, 1859, on the aftermath of the Battle of Cepeda. It established guidelines for the entry of the latter into the Confederation, and Buenos Aires' acceptance of the Argentine Constitution of 1853.
The Argentine Confederation, consisting of thirteen provinces in the interior, and the State of Buenos Aires, formed by the Province of Buenos Aires had divided what today is Argentina since the 1852 Battle of Caseros removed the paramount Governor of Buenos Aires, Juan Manuel de Rosas (who had wielded the sum of public power since 1835, thereby keeping the nation tenuously united). The division was caused by the refusal of Buenos Aires to endorse the San Nicolás Agreement of 1853 or to recognize the Constitution of Argentina, promulgated that year.
The most contentious issue remained the Buenos Aires Customs, which remained under the control of the city government and was the chief source of public revenue. Nations with which the Confederation maintained foreign relations, moreover, kept all embassies in Buenos Aires (rather than in the capital, Paraná).
The Buenos Aires government also enjoyed numerous alliances in the hinterland, including that of Santiago del Estero Province (led by Manuel Taboada), as well as among powerful Liberal Party governors in Salta, Corrientes, Tucumán and San Juan. The 1858 assassination of San Juan's Federalist governor, Nazario Benavídez, by Liberals inflamed tensions between the Confederation and the State of Buenos Aires. Relations deteriorated further with the signing of a free trade agreement between the Port of Rosario (the chief Confederate port) and the Port of Montevideo to the detriment of Buenos Aires. The election of Valentín Alsina as Governor of Buenos Aires made hostilities imminent, culminating in the Battle of Cepeda of October 23, 1859.