After the Argentine-Brazilian war, which brought the independence of the Banda Oriental del Uruguay, the political situation in the provinces was greatly affected 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.
The governments of the provinces that sympathized with Paz, or that were militarily controlled by their troops, sent representatives to Córdoba, which signed on July 5, 1830 a treaty of peace and friendship, and a defensive and offensive alliance.
The signatories were Juan Antonio Saráchaga of Cordoba, Enrique Araujo of Catamarca, José María Bedoya of San Luis, Francisco Delgado of Mendoza and Andrés Ocampo of La Rioja.
The War of Argentine Independence had strongly upset the region for several reasons: trade with Upper Peru had been cut off, the workforce was drafted into the military, and the market of the coastal provinces had been lost due to the competition from the English.
In reality, each member province of the League did continue to operate autonomously, as the political situation of the region prevented any form of complete unity.
The need to face a possible threat on the part of the coastal provinces meant that on August 31, 1830 the governments of the League of the Interior agreed to grant General Paz the Dictator-like powers by signing a Pact of Union and Alliance.