[1] After the signing of the British-broken Treaty of Lircay, that established a comprehensive truce between the patriot government of Chile and the Cortes de Cádiz through the royalist Viceroyalty of Perú, some factions within the pro-independence movement perceived this diplomatic approach to Spain as a treason.

On 25 July 1814, the radicals overthrew Supreme Director Francisco de la Lastra and appointed Jose Miguel Carrera as the head of a provisional junta.

When the Viceroy of Peru, José Fernando de Abascal, heard about the revolt in Chile, he sent an expedition of Spanish soldiers and royalists to defeat the rebellion.

[4] With casualties growing, the Chilean forces requested reinforcements from the capital city of Santiago, which was 87 Kilometers north of Rancagua.

After this victory, the Spanish army continued on to Santiago, crushed the Chilean Government and instituted their brutal Reconquista of Chile.