Albigensian Crusade

The Albigensian Crusade (1209-1229) was a military campaign initiated by the Catholic Church against the Cathars, a Christian sect in southern France that held beliefs contrary to Catholic doctrine. The Church deemed the Cathars heretical, leading to widespread violence and persecution. The crusade resulted in significant loss of life and the destruction of towns. It also contributed to the consolidation of royal power in France and the establishment of the Inquisition. Ultimately, the crusade aimed to eradicate Catharism, reinforcing the Catholic Church's authority in medieval Europe.