On April 30, 1871, an unlikely group of Anglo-Americans, Mexican Americans, and Tohono O'odham Indians massacred more than a hundred Apache men, women, and children who had surrendered to the U.S. Army at Camp Grant, near Tucson, Arizona. Thirty or more Apache children were stolen and either kept in Tucson homes or sold into slavery in Mexico. Planned and perpetrated by some of the most prominent men in Arizona's territorial era, this organized slaughter...