Original: However, by 1212 Muhammad III, "al-Nasir" (1199–1214) was defeated by an alliance of the four Christian princes of Castile, Aragón, Navarre and Portugal, at the Battle of Las Navas de Tolosa in the Sierra Morena.
Simplified: But by 1212 Muhammad III, "al-Nasir" (1199–1214) was defeated by an alliance of the four Christian princes of Castile, Aragón, Kingdom of Navarre and Portugal, at the Battle of Las Navas de Tolosa in the Sierra Morena.