The Battle of Portopí (12 September 1229) was an open field military conflict between the Almohad troops that occupied the island of Majorca and the Christian army led by King James I the Conqueror with the aim of annexing it to the Crown of Aragon in order to expand their domain. It was carried out at various points in the current Sierra de Na Burguesa (formerly called Sierra de Portopí), approximately halfway between the current resort town of Santa Ponsa and the City of Majorca (present Palma de Mallorca). It was the second major battle in the campaign for the conquest of the island of Majorca initiated by the Aragonese king.