The Battle of Jerez took place in 1231 near the southern Spanish city of Jerez de la Frontera during the Reconquista. King Ferdinand III of Castile and León's troops fought against those of Emir Ibn Hud of the taifa of Murcia. The Castilian forces were led by Ferdinand's brother, Prince Alfonso de Molina, assisted by Álvaro Pérez de Castro; according to some accounts Castro led the Castilians, not Molina. The battle is traditionally seen as marking the collapse of Ibn Hud's authority, and allowing the rise of his successor, Muhammad I.