conservatives, fought an internecine war among themselves. General Pedro Antonio Olañeta, commander in Upper Peru, rebelled against the liberal viceroy
these circumstances, on April 22, 1820, a convoy commanded by Commodore AntonioVacaro sailed from Callao to Guayaquil, bringing a battalion to reinforce the
command of Rosendo Porlier, who was to replace the naval chief of Callao AntonioVacaro. Two poorly provisioned ships of the line San Telmo (74 guns) and Alejandro
Viceroy Pezuela, and the incompetence of the Commanding General of Navy AntonioVacaro. The Spanish fleet, based in Callao, was mainly formed by the frigates