Despite everything that American Indians had endured in the past, the warrior tradition—the tradition of protecting their people—called many of them to serve in the United States military. They cared about their communities and the lands on which their people had lived for thousands of years. Many of them also served out of a sense of patriotism, wanting to defend the United States

Philip Johnston was a World War I veteran who had heard about the successes of the Choctaw telephone squad. Johnston, although not Indian, had grown up on the Navajo reservation. In 1942, he suggested to the Marine Corps that Navajos and other tribes could be very helpful in maintaining communications secrecy. After viewing a demonstration of messages sent in the Navajo language, the Marine Corps was so impressed that they recruited 29 Navajos in two weeks to develop a code within their language.The Marine Corps recruited Navajo Code Talkers in 1941 and 1942. After the Navajo code was developed, the Marine Corps established a Code Talking school. As the war progressed, more than 400 Navajos were eventually recruited as Code Talkers.