S.G. Colley, U.S. Indian Agent, Report, Joint Committee on the Conduct of the War
“[F]rom the time that Major Wynkoop left this post to go out to rescue white prisoners until the arrival of Colonel Chivington here, which took place on the 28th of November last, no depredations of any kind had been committed by the Indians within two hundred miles of this post; that upon Colonel Chivington’s arrival herewith a large body of troops he was informed where these Indians were encamped. . . . [T]hat not withstanding his knowledge of the facts as above set forth, he is informed that Colonel Chivington did, on the morning of the 29th of November last, surprise and attack said camp of friendly Indians and massacre a large number of them, (mostly women and children,) and did allow the troops of his command to mangle and mutilate them in the most horrible manner.”
Source: S.G. Colley, U.S. Indian Agent, Report, Joint Committee on the Conduct of the War, 38th Congress, 2nd Session, 1865.