An Important Primary Source of One of the Most Significant Atrocities in the Indian Wars with Unique Contemporary Annotations On the morning of November 29, 1864, Colorado state cavalry under the command of Col. John Chivington attacked a peaceful encampment of mostly Cheyenne Indians along the Sand Creek in Colorado, slaughtering perhaps as many as 160 people, mostly women and children. It was one of the most egregious atrocities of the Indian Wars. Even with the country embroiled in a Civil War, the gravity of the situation can be gauged by the fact that within six weeks of the killings, a Joint Committee of Congress conducted a public hearing. Congress vilified Chivington in summarizing his cowardly and racist attack in their published report: "Wearing the uniform of the United States, which should be the emblem of justice and humanity . . . he deliberately planned and executed a foul and dastardly massacre." The Sand Creek Massacre: The Official 1865 Report contains a facsimile of the "Report of the Joint Committee on the Conduct of the War: Massacre of the Cheyenne Indians" along with unique annotations made by a reader at the time and the attached typescript testimony of the African American pioneer James P. Beckwourth, in which he recounts the atrocity. This edition is introduced by Bill Yenne. who places the Sand Creek Massacre in context within the Civil War and Indian Wars and provides biographical information about the main persons involved.