In 1212, the knights of the Holy Roman Empire, France, and Spain pushed the Moors far down the Iberian Peninsula... but why didn't they go on and drive the Muslims completely off that peninsula? Did they have a reason for leaving southern Spain in the hands of the Almohads, when they could have easily driven them off?
Also, was this push at the Muslims in any way related to the "Children's Crusade" of the same year?