campaign of 1231, including the battle. Effect In his chronicle, Alfonso X referred to the operation as a cavalgada, a large-scale mounted raid. Alfonso X described its impact as follows: Gonzalo Martínez Diez concludes that the defeat certainly weakened Ibn Hud's power base, for in April 1232 a challenger arose in the person of Muhammad ibn Nasr, who proclaimed himself emir in Arjona, and would eventually become the first Nasrid ruler of Granada. According to Julio González, Ibn Hud was perhaps more concerned with eliminating the remnants of the Almohads, as he took Gibraltar from them in October 1231, finally driving them out of the peninsula, and later laid siege to Ceuta in 1232. Ibn Hud's reign started to fall apart only a year later, between October 1232 and October 1233, suffering both internal and external setbacks: a rebellion in Seville sought alliance with ibn Nasr, the Christians took Úbeda, and the Almohads secured Ceuta. Another measure of the unraveling of Ibn Hud's power is that a later raid against Cádiz went unopposed, and the city was ferociously sacked by Christian mercenaries in 1234–1235 (Hijri year 632). The battle was later glorified in the writings of the 19th-century Spanish romantic writer Adolfo de Castro. References Jerez Jerez 1231 in Europe 13th century in Al-Andalus Jerez de la Frontera Jerez 13th century in Castile