Original sentence: It is significant because of its violence, extreme even by medieval standards; the domination and control by northern French nobles (in particular the King of France) over southern France, even to modern times; and its role in the creation of the Medieval Inquisition.The Albigensian Crusade (1209-1229) was a 20-year military effort initiated by the Roman Catholic Church to crush the Cathars in southern France, a sect considered heretical by the Roman Catholic hierarchy
Edited sentence: It is significant for the ruthless and bloody events, even by medieval standards; the domination and control by northern French nobles (in particular the King of France) over southern France, even to modern times; and led to the creation of the Medieval Inquisition.The Albigensian Crusade (1209-1229) was a 20-year military effort initiated by the Roman Catholic Church to crush the heretical sect of the Cathars in southern France