From the Ancient Greeks' obsession with the armies of the Persians, Westerners have been irresistibly drawn to the exotic nature of "Oriental" warfare and have sought either to emulate their enemies' imagined ways of fighting or to incorporate Eastern warriors and "martial races," such as the Sikhs and Gurkhas, in their own forces. The alluring yet terrifying prospect of Samurai warriors, obedient to an ancient code of chivalry, or of the Mongol cavalry...