Upon learning the outcome of the Battle of Rancagua (qualified as a "Disaster" in Chilean historiography), many patriots decided to gather those belongings they could carry and began their exile in Mendoza.

Osorio received orders from the viceroy to be commiserated, but the person in charge of the kingdom's security, the captain of the Talavera de la Reina Regiment, Vicente San Bruno, did not tolerate it.

Marcó del Pont made good friends with San Bruno, whom he placed in the position of president of the Surveillance and Public Security Court, establishing an espionage network that imposed terror in Santiago.

The Spanish rulers were unable to extinguish the patriotic sentiment provoked by the formation of the Army of the Andes, led by Captain General San Martín with the help of Brigadiers O'Higgins, Miguel Estanislao Soler and Juan Gregorio de Las Heras.

On February 12, 1817, victory occurred in Chacabuco, under the command of General José de San Martín, supported by the Chilean Bernardo O'Higgins and the Argentine Soler, beginning the Patria Nueva (1817-1823).