On February 23, 1945, U.S. Marines claimed victory in the battle of Iwo Jima, one of the most important battles in the Pacific islands during World War II. Instrumental to this defeat of Japanese forces was a group of specialized Marines involved in a secret program. Throughout the war, Japanese intelligence agencies were able to intercept and break nearly every battlefield code the United States created. The Navajo Code Talkers, however, devised...