the Christian Kingdoms By Valfer Dec 24, 711 Political development Muslims occupied the Iberian Peninsula Dec 24, 722 The battle of Covadonga Dec 24, 739 Alfonso 1 King of Asturias Dec 24, 1038 Castilla and Leon unite Dec 24, 1212 The battle of Navas de Tolosa Dec 24, 1230 Castilla and Leon reunite Dec 24, 1492 Surrender of Granada