The Navajo code was created using Navajo as a base to a alphabet substitution code in 1942 by Philip Johnston and the original 29 Navajo code talkers. He was the son of a missioonary and had grow up on the Navajo reservation.
The Japanese never broke the code. About 400 of the 540 of the Navajo who served in the Marines in WWII were code talkers. The code even could not be broken by Navajos who were captured and tortured by the Japanese. Hr said after the war to one of the code talkers; "I never figured out what you guys who got me into all that trouble were saying."
It was used in the Pacific war, in the Occupation of Japan and in the Korean War. It was declassified in 1968. They could not receive recognition until after that.
In 1968, it was declassified under the Department of Defense (DoD) directive 5200.9
the japanese never cracked the code.
There were no Navajo code "breakers" . That means someone who tries to figure out and unknown code. Native Americans who worked for the American side in World War II were sometimes called "code talkers". They used a substitution code to encode English orders using a native American language, mostly Navajo but other ones were used too.
Navajo Code Talkers
The Navajo Code Talker program was run by the US Marines. In WWII women were not allowed to join the Marines. The code used Navajo as a base but was encoded in that so a Navajo speaker could not understand it and would need to memorize the secret code to use it.
Code Talkers were specially trained in the art of code talking in the language of the Navajo people. As I understand it, most were of Navajo descent but not all.
They were young Navajo men from the Navajo tribe in the United States recruited to learn the Navajo code and conduct radio communications on the war front.
Some Navajo were drafted but the Code Talkers were volunteers.
The Navajo were recruited to serve in the military to help create a Navajo code and used it to confuse the Japanese. They were called the Navajo Code Talkers and a few are still alive. They finally received medals from the President. Only the Navajo could use and fully understand the code. Some of the upper military leaders learned some of it as it was created and they taught the Navajos how to send and receive code.
The Navajo Code Talkers were people who used a spoken code in the Navajo language to communicate between US units on the battlefield in the Pacific Theater of War during World War 2.
Were called the Navajo Code Talkers.
I believe you are referring to the Navajo Code Talkers. The Navajos were recruited to use their language to speak in code and sent Morse code in the Navajo Code. The Japanese could not recognize the language.
Where ever they want to.
because of the rarity of their language, the chances of a Japanese code breaker speaking Navajo was pretty remote.