Who were the first Code Talkers?

The code-talkers of World War II mostly refer to the Native Americans who used parts of their indigenous languages to translate secret tactical messages into code, then decipher the code back into the message. They were used in the Pacific Theater of World War II, and, to a lesser extent, in the European Theater. The most decorated Native American code-talkers were Navajo, but Native Americans of the Comanche and Meskwaki people also served as code-talkers during the war.