Bible is supernaturally inspired., page-147

Albigensian Crusade

The Cathars triggered the Albigensian Crusade, the only crusade led against Europeans. Following the assassination of the papal legate in the year 1208, Pope Innocent III declared a crusade against the Albigenses. This developed into a political conflict with civil war between the north and south of France that lasted until 1229.
https://europe.factsanddetails.com/article/entry-733.html