 After the Sand Creek massacre, according to George Bent, the Cheyenne, Northern Arapaho, and the Brulé and Oglala sub-tribes of the Lakota met about January 1, 1865 on Cherry Creek in present-day Cheyenne County, Kansas.They agreed on war with the whites and decided to attack Camp Rankin and the nearby settlement of Julesburg, Colorado.The Sioux, the first to agree to war, had the honor of leading a column of possibly 1,000 warriors and an additional 3,000 women and children.