On the morning of the Battle of the Little Bighorn, Stabbed, one of Lt. Col. George Custer's senior scouts, maneuvered his pony through 24 other Arikaras attached to the 7th Cavalry. "Young men, keep up your courage, don't feel that you are children," he exhorted. "Today will be a hard battle." Then he took some clay he had brought with him from the Arikara homeland in North Dakota and rubbed it in his hands. One by one, Stabbed called the scouts to him. "He spat on the clay and then rubbed it on their chests," surviving scouts told historian O.G....