Battle of Las Navas de Tolosa
After a brief period of disintegration (the second Taifa period), the Almohads, the rising power in North Africa, took over most of "Al-Andalus". However they were decisively defeated at the Battle of Las Navas de Tolosa (1212) by a Christian coalition, losing almost all the remaining lands of "Al-Andalus" in the following decades. By 1252 only the Kingdom of Granada remained intact but as a vassal state of Castile.