The correct answer is Philip Johnston
Johnston was a civil engineer for the city of Los Angeles. He made the case for the use of Navajo to the United States Marine Corps at the commencement of World War II as a secret weapon to help achieve victory in the war
Answer: The correct answer is : Philip Johnston
Explanation: Johnston was a civil engineer who grew up speaking Navajo, a language that is rarely used outside of reserves. 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.
