Arizona Republic published on August 29, 2019 an article about the Navajo Code Talkers that starts of with ... "In 1942, during the depths of World War II, the United States Marine Corps recruited 29 Navajo men to develop an unbreakable code that would be used across the Pacific during the war ... [MORE] "

Additional information:

• https://www.intelligence.gov/index.php/people/barrier-breakers-in-history/453-navajo-code-talkers
• https://en.wikipedia.org/wiki/Code_talker
• https://americanindian.si.edu/education/codetalkers/html/chapter4.html