The Unitarian League was a league of provinces of Argentina led by José María Paz

José María Paz

Brigadier General José María Paz y Haedo was an Argentine military figure, notable in the Argentine War of Independence and the Argentine Civil War.-Childhood:...

, established in 1830, aiming to unite the country under unitarian

Unitarian Party

Unitarianists or Unitarians were the proponents of the concept of a Unitary state in Buenos Aires during the civil wars which shortly followed the Declaration of Independence of Argentina in 1816. They were opposed to the Argentine Federalists, who wanted a federation of independent provinces...

 principles. It was composed by 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

Pacto Federal

The Federal Pact was a treaty first signed by the Argentine provinces of Buenos Aires, Entre Ríos and Santa Fe on 4 January 1831, for which a Federal military alliance was created to confront the Unitarian Liga Unitaria...

.