Pact of San José de Flores
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 son of the President of Paraguay, General Francisco Solano López, had attempted to prevent the Battle of Cepeda, persuaded Governor Alsina to accept Urquiza's offer, and a meeting place was soon arranged in the village of San José de Flores (west of the capital), by Buenos Aires emissaries Juan Bautista Peña (Minister of the Economy) and jurist Carlos Tejedor.The influence of the new governor of Buenos Aires, Bartolomé Mitre, on the Derqui presidency was strong, and Mitre obtained numerous important bills from Derqui, including an extension on the province's customs house concession and measures benefiting the Bank of the Province of Buenos Aires, whose currency was authorized for use as legal tender at the customs house (thereby controlling much of the nation's foreign trade).These concessions would strain Derqui's relations with Urquiza, who had been returned as governor of Entre Ríos, though the enactment of the new constitution on October 8 temporarily placated ongoing tensions.This impasse continued until, on November 16, Domingo Sarmiento organized a revolt in his native San Juan Province, leading to Governor José Antonio Virasoro's murder and renewed hostilities.