books.google.es - In 1209 Simon of Montfort led a war against the Cathars of Languedoc after Pope Innocent III preached a crusade condemning them as heretics. The suppression of heresy became a pretext for a vicious war that remains largely unstudied as a military conflict. Laurence Marvin here examines the Albigensian...http://books.google.es/books/about/The_Occitan_War.html?hl=es&id=NlLPaBcCn2QC&utm_source=gb-gplus-shareThe Occitan War
