The Unitarian League () also referred to as the League of the Interior () was a league of provinces of Argentina led by José María Paz, established in 1830, aiming to unite the country under unitarian principles. It comprised the provinces of San Luis, La Rioja, Catamarca, Mendoza, San Juan, Tucumán, Córdoba, Salta and Santiago del Estero. It was opposed and ultimately defeated by the provinces of the Federal Pact. Formation After the Argentine-Brazilian war, which brought the independence of the Banda Oriental del Uruguay, the political situation in the provinces was greatly effected by the disappearance of Rivadavia's Unitarian national government. Due to this the provinces proclaimed their autonomy and gave the governor of Buenos Aires, Manuel Dorrego, the responsibility to manage Argentina's foreign relations. Many attempts were made to reorganize the national government under the ideals of the Federalist Party, but they all failed, as a result, the Unitarian party attempted to retake control. They took advantage of the dissatisfaction that the generals of the National Army expressed with the peace treaty signed by Dorrego, to promote a political-military uprising. In December 1828 General Juan Lavalle executed Dorrego, taking over the government of Buenos Aires; shortly after the Cordovan general José María Paz marched with another division of the national troops and seized Córdoba after defeating the governor Juan Bautista Bustos in the Battle of San Roque. The Argentine civil war began in 1829, while the Federalist Caudillos of the coastal provinces were able to defeat Juan Lavalle, Paz consolidated his dominance of Cordoba while detouring two invasions from Juan Facundo Quiroga, the Caudillo of La Rioja. General Paz, knowing that the revolution had failed in Buenos Aires and the coastal provinces, he then proclaimed that his intention was to remain in his native province without attacking the other provinces, but then considered the need to occupy his neighboring provinces to ensure his control of Cordoba. The governors of Salta and Tucumán were the first to join the unitary league and then collaborated in the occupation of the provinces governed or influenced by federalist caudillos. Numerous military units occupied the provinces of San Juan, La Rioja, Mendoza and Santiago del Estero with little or no resistance, while in the provinces of Catamarca and San Luis also assumed governments that were sympathetic to Paz's cause. This created a clear political divide within the country between the Unitarian inland provinces