Devil's Backbone — Terry C. Johnston

The Modoc Indians and American officials had been flirting with war in the Oregon Territory for some time. When Modoc chief Keintpoos murdered a Civil War hero during negotiations, the U.S. Army launched a deadly offensive against the rebel tribe. Besieged in the natural stronghold of the Lava Beds near Tule Lake, the Modocs waged bloody war for seven long months.

Sergeant Seamus Donegan, on the trail of his uncle, Ian O'Rourke, arrived at Tule Lake just as the conflict erupted. Soon Donegan and the brooding O'Rourke found themselves embroiled in what would be the costliest war in frontier history...