Original sentence: The brutality of the Sand Creek Massacre on 29 November 1864 brought war to the South Platte River valley, as the Cheyenne, Lakota, and Arapaho retaliated for the attack on a peaceful village of mostly women, children, and old men
Edited sentence: The senseless brutality of the Sand Creek Massacre on 29 November 1864 brought war to the South Platte River valley, as the Cheyenne, Lakota, and Arapaho retaliated for the attack on a peaceful village of mostly women, children, and old men