 Young Man Afraid of His Horses' Oglala band became known as the "Payabya" band.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.On 7 January 1865, a combined force of 1000 warriors attacked the stagecoach station at Julesburg, Colorado, and they continued raiding throughout the South Platte region for several weeks.