Colorado War

The Colorado War was an Indian War fought in 1864 and 1865 between the Southern Cheyenne, Arapaho, and allied Brulé and Oglala Lakota (or Sioux) peoples versus the U.S. Army, the Colorado militia, and white settlers in Colorado Territory and adjacent regions. The Kiowa and the Comanche played a minor role in actions that occurred in the southern part of the Territory along the Arkansas River. The Cheyenne, Arapaho, and Lakota Sioux played the major role in actions that occurred north of the Arkansas River and along the South Platte River, the Great Platte River Road, and the eastern portion of the Overland Trail. The United States government and Colorado Territory authorities participated through the 1st Colorado Cavalry Regiment, often called the Colorado volunteers. The war was centered on the Colorado Eastern Plains, extending eastward into Kansas and Nebraska. The war included an attack in November 1864 against the winter camp of the Southern Cheyenne Chief Black Kettle known as the Sand Creek massacre. The engagement, initially hailed as a great victory, was later publicly condemned as an act of genocidal brutality. The massacre resulted in military and congressional hearings which established the culpability of John M. Chivington, the commander of the Colorado Volunteers, and his troops. The Indians' response to the Sand Creek Massacre was a move northward to the more isolated lands of Wyoming to join their relatives, the Northern Cheyenne, the Northern Arapaho, and the main body of the Lakota Sioux. En route they carried out extensive raids along the South Platte River and attacked U.S. military forts and forces, successfully eluding defeat and capture by the U.S. army.