The Colorado War fought by Cheyenne, Arapaho and Sioux, was fought in the territories of Colorado to Nebraska. The conflict was fought in 1863–1865 while the American Civil War was still ongoing. Caused by dissolution between the Natives and the white settlers in the region, the war was infamous for the atrocities done between the two parties. White militias destroyed Native villages and killed Indian women and children such as the bloody Sand Creek massacre, and the Indians also raided ranches, farms and killed white families such as the American Ranch massacre and Raid on Godfrey Ranch.