History of Chile the Spaniards at the Battle of Chacabuco on February 12 and marking the beginning of the "Patria Nueva". San Martín considered the liberation of Chile a strategic stepping-stone to the emancipation of Peru, which he saw as the key to hemispheric victory over the Spanish. Chile won its formal independence when San Martín defeated the last large Spanish force on Chilean soil at the Battle of Maipú on April 5, 1818. San Martín then led his Argentine and Chilean followers north to liberate Peru; and fighting continued in Chile's southern provinces, the bastion of the royalists, until 1826. A declaration
Army of the North a victory at Utarango but was later defeated on 12 February by the San Juan river. Rondeau received an order to retreat to Tucumán. The army, almost beaten, marched for nine months going through Potosí and Humahuaca until reaching Tucumán. On 7 August 1816 at Trancas, Rondeau was replaced again by Manuel Belgrano. Martín Miguel de Güemes was named commander of the northern border. Belgrano moved the army to the citadel built by San Martín in the city of Tucumán. There he attempted to rebuild the morale, and materials, in search for a new action in Upper Peru, combining with