The need for specific materials relating to the history of the Navajo Indian people has led o the writing of this Navajo history textbook, which covers the major areas of Navajo history from 1846 to present.

During World War II, the Japanese had managed to crack every code the United States used.  But when the Marines turned to its Navajo recruits to develop and implement a secret military language, they created the only unbroken code in modern warfare-and helped assure victory for the United States over Japan in the South Pacific.