After the demise of the Liga Federal, led and inspired by José Gervasio Artigas, the first meeting between the provinces of Santa Fe, Entre Ríos, Corrientes and Buenos Aires, with the purpose of an alliance, took place on July 20, 1830, in Santa Fe.It had the following representatives: Domingo Cullen for Santa Fe, Diego Miranda for Entre Ríos, Pedro Ferré for Corrientes and José María Roxas y Patrón for Buenos Aires.In fact, the Argentine Constitution of 1853 starts by justifying its creation "with the purpose of fulfilling pre-existent pacts," which refers to this and other agreements.The creation of a Constitutional Assembly had been planned long before 1853, but the negative of Juan Manuel de Rosas, governor of Buenos Aires and strong member of the treaty, delayed it.The members of the Pacto Federal joined the United Provinces of the River Plate in the founding of the modern state of Argentina.
During the civil war 1828–1831, inland provinces formed a union.