Liberating Expedition of Peru

The Liberating Expedition of Peru (Spanish: Expedición Libertadora del Perú) was a naval and land military force created in 1820 by the government of Chile in continuation of the plan of the Argentine General José de San Martín to achieve the independence of Peru, and thus consolidate the independence of all former Spanish-American colonies. It was vital to defeat the Viceroyalty of Peru—the center of royalist power in South America—from where royalist expeditions were sent to reconquer the territories lost to the independence fighters.

Source: Wikipedia — Liberating Expedition of Peru (CC BY-SA 4.0)