Why Americans Started Using Navajo Code Talkers And Left Japanese Codebreakers Baffled Discover the extraordinary story of the Navajo Code Talkers, the 420 Native American Marines who created and operated the only unbreakable code in modern military history during World War II, baffling Japanese cryptographers who had successfully cracked every other American encryption system. This compelling historical narrative reveals how Philip Johnston, who grew up on the Navajo reservation, proposed using