The Battle of Angamos (Combate naval de Angamos) was fought on October 8, 1879, during the naval stage of the War of the Pacific (Guerra del Pacífico). The Chilean Navy, commanded by Captain Galvarino Riveros and Captain Juan Jose Latorre surrounded and captured the ironclad Huáscar, commanded by Rear Admiral Miguel Grau Seminario, who died in combat. After the battle, the crippled Peruvian Navy was unable to prevent the invasion of its territory. The Huascar was repaired and served under the Chilean flag until its decommission, and now sits as a floating museum in the port of Talcahuano.

After the Naval Battle of Iquique, the Peruvian ironclad Huascar made several incursions into Chilean waters, challenging the Chilean navy's domination along its entire coast; the Huascar attacked ports and captured transports.

Chile's plan was to achieve naval supremacy prior to invading Bolivian and/or Peruvian territory to establish the logistic advantage needed to launch a terrestrial campaign. No attempt to disembark troops could be made by the Chileans, because the Huascar was preventing the entire Chilean Navy from taking control of the sea; the Chilean fleet was in a diminished state of readiness after a long campaign away from its base. In order to initiate the naval stage of the compaign the Huascar had to be eliminated or captured.