prepared a demonstration to encourage the United States to begin a Navajo code talking program.

When he could no longer fight in the Second World War because of his age, he had the idea of having a secret code in Navajo and proposed this to the US Marine Corps, after doubts and tests, Johnston finally convinced them and they were initially recruited 30 Navajos specialized in telecommunications.

it was made because he wanted to try to make people convert as well people who would have read or studied this item at the time it was created were probably people who wanted to change religions who thought conversion was a good idea.

b) brahmans   is nomadic society