This kingdom sent an emissary to the court of Abaqa Khan in an ill-fated attempt to organize what would become known as the 1269 Crusade of the Infants. A group of soldiers from this kingdom defeated the Karasid beylik at the 1303 Battle of Cyzicus and seized the lands of Walter V around Athens after the Battle (10[1])of Halmyros. (10[1])A ruler of this kingdom was killed after his army’s defeat at the Battle of Muret, the last major battle of the Albigensian (10[1])Crusade. This kingdom changed dynasties when its queen Petronilla married (-5[1])Count Ramon Berenguer IV. (-5[1])After anti-French riots, Peter III of this kingdom (10[1])defeated Charles I (-5[1])of Anjou (10[1])in the War of the Sicilian Vespers. This kingdom’s ruler James (10[1])I conquered Valencia from the Almohads. For 10 points, name this Spanish kingdom that was ruled by Ferdinand II when he married Isabella of Castille. ■END■ (10[2])