“Three Years on the Plains: Observations of Indians, 1867–1870” is a book of heroes and villains of history. It tells about various Indian-Anglo conflicts during the 1860s. The author shares information about the important military occupation of the Bozeman Trail and about the Fort Laramie “massacre” of 1866, when Sioux, Cheyennes, and Arapahos wiped out Captain William J. Fetterman and his command.