Castles against castles: warfare castles in Iberian Middle Ages

The study of the operative capacities of the military architecture of the Middel Ages shows a wide range of their possible functions working as organizing elements of the territory, his resources and his occupying people. They become symbols and represent the military role, which they always had. However, something in their functional reality has not been systematically studied yet; that is the fact that many castles become an essential tool to counteract, weaken and finally conquer another castles and they worked as a resource for the medieval armies in their occupying and conquering campaigns.