The Navajo language is so complex and difficult to learn, which is why it is called "The Unbreakable Code." The Navajo language had no alphabet or symbols. The words were not written down in any book anywhere, which is why this language was the perfect idea for a code!
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The Japanese were excellent code-breakers, but they were unable to de-code the Navajo language. They weren't even sure it was humans talking. Before, the Japanese knew all of the battle arrangements and when the attack would be coming. America lost many battles without the Code talkers. ("The Code Talkers")
