Alsina was forced by his own allies to leave office because of his intransigent position to the reintegration of Buenos Aires to the Confederation. On November 11, on the mediation of Francisco Solano López of Paraguay, Buenos Aires and the Argentine Confederation signed the San José de Flores Pact by which Buenos Aires was de jure reincorporated into Argentina but the province was allowed certain privileges. That would eventually led to the Battle of Pavón and the growing predominance of Buenos Aires Province. References Citations Bibliography See also Argentine Confederation San Nicolás Agreement Argentine Constitution of 1853 Pact of San José de Flores Battle of Pavón Battles of the Argentine Civil War Conflicts in 1859 October 1859 events 1859 in Argentina History of Buenos Aires Province