サンドクリークの虐殺
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.