On this day(7/16) in 1212: Battle of Las Navas de Tolosa: After Pope Innocent III calls European knights to a crusade, the forces of kings Alfonso VIII of Castile, Sancho VII of Navarre, Peter II of Aragon and Afonso II of Portugal defeat those of the Berber Muslim leader Almohad, thus marking a significant turning point in the Reconquista and in the medieval history of Spain.