Casto Secundino María Méndez Núñez (July 1, 1824 – August 21, 1869) was a Spanish naval officer born in Vigo, Galicia. In 1866 during the Chincha Islands War between Spain, Peru and Chile, he was general commander of the Spanish fleet in the Pacific. As such, he bombarded and destroyed the port of Valparaiso, and fought the Battle of Callao (during which he was injured nine times.) Méndez Núñez was the first man to circumnavigate the world on an ironclad warship: "Enloricata navis quae primo terram circuivit".