nov 29, 1864 - Sand Creek Massacre

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The Sand Creek massacre (also known as the Chivington massacre, the battle of Sand Creek or the massacre of Cheyenne Indians) was a massacre of Cheyenne and Arapaho people by the U.S. Army in the American Indian Wars that occurred on November 29, 1864, when a 675-man force of the Third Colorado Cavalry[3] under the command of U.S. Volunteers Colonel John Chivington attacked and destroyed a village of Cheyenne and Arapaho people in southeastern Colorado Territory,[4] killing and mutilating an estimated 70–500 Native Americans, about two-thirds of whom were women and children

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