Original sentence: Arnaud Amaury (; died 1225) was a Cistercian abbot who played a prominent role in the Albigensian Crusade.He is remembered for purportedly advising a soldier who was worried about killing Catholics instead of just heretic Cathars, prior to the sack of Béziers, to simply kill everyone, as God would sort it all out later.In 1204, he was named a papal legate and inquisitor and was sent by Innocent III with Peter of Castelnau and Arnoul to attempt the conversion of the Albigensians
Edited sentence: After Pope Innocent III had declared a crusade to eliminate Catharism in the Languedoc, a crusader army consisting of knights with their retinue (mostly from northern France), professional soldiers, mercenary bands (routiers), and pilgrims, assembled and departed from Lyon in early July 1209.Arnaud Amaury (; died 1225) was a papal legate and inquisitor, as well as a Cistercian abbot who played a prominent role in the Albigensian Crusade ordered by Pope Innocent III.Arnaud Amaury responded by ordering the crusaders to "simply kill everyone, as God would sort it all out later".By end of that tragic day of July 22, 1209, Arnaud's crusaders had shed the blood of all those souls unfortunate to be found within the city of Béziers.Estimates of the slaughter come to a total of more than 20,000 men, woman, and children.He is the originator of the saying, "Kill them all and let God sort them out".In 1204, he was named a papal legate and inquisitor and was sent by Pope Innocent III with Peter of Castelnau and Arnoul to attempt the conversion of the Albigensians.In total, the Crusade against the Cathars, resulted in the killing of more than half of the population of southern France, nearly all the Cathars and more than one million men, women, and children.Just prior to the sack of Béziers, a soldier expressed concern about killing Catholics by mistake when the soldiers set out to slaughter the Cathars.[1] Béziers, a stronghold of Catharism, was the first major town the crusaders encountered