In 1819, the San Telmo, commanded by Captain Joaquín de Toledo y Parra, was the flagship of a Spanish naval squadron under Brigadier Rosendo Porlier y Asteguieta bound for Callao, Peru, to reinforce colonial forces there fighting the independence movements in Spanish America. It was damaged by severe weather in the Drake Passage, south of Cape Horn on 2 September 1819, and sank with all 644 people on board.
Prior to the battle that led to the capture of Valdivia in February 1820, the patriot force told the Spanish garrison of the Valdivian Fort System they were part of the convoy of San Telmo. Using this tactic they were able to approach the beach at Aguada del Inglés largely undisturbed before their amphibious assault begun.[7]