The Civil War has just concluded, yet new war breaks out on the western frontier: a clash of cultures between the Native tribes who have lived on the land for centuries and a young, ambitious nation. Colonel Henry Carrington arrives in Wyoming's Powder River Valley to lead the U.S. Army in defending a new road for gold miners and settlers. But in this tense novel by the author of The Revenant, he will have to contend with Chief Red Cloud and the visionary warrior Crazy Horse, even as his own troops are tempted to desert him.