On a wintry day in December 1890, near a creek named Wounded Knee on the Pine Ridge Reservation in South Dakota, the Seventh Cavalry of the U. S. Army opened fire on an encampment of Sioux Indians led by Big Foot. Coming two weeks after the killing of Sitting Bull, in a tense atmosphere of suspicion and misunderstanding, the careless discharge of one gun set off a massacre that claimed more than 250 lives, including those of many Indian women and...