 It s pay call at Fort Courage when a top secret letter from Washington arrives. F Troop has been chosen as a test troop for a new style of Indian fighting...infiltration through camouflage. Major Bentley-Royce of the Bengal Lancers will be instructing them. He is a master of disguise and a living legend known as  The Phantom Major . He also wants to prove the fort is obsolete. O Rourke and Agarn will have to enlist the Hakawi in order to prove him wrong.