Even though the "Code Talkers" were Navajo and Marines and in the South Pacific and this film was made in 1952 and even though the Navajo Code Talkers' secrecy was not declassified until 1968, someone knew about it and put a different spin on the facts. I was surprised when it was disclosed only a few years ago about the real code talkers. The Thunderbirds was a nickname for the 45th Infantry Division of Oklahoma. They fought in the European Theatre in World War II. As far as I remember (50 years ago) from the movie there were no Navajos from Oklahoma. Still a good movie for the old Saturday afternoon matinees where we had 5 cartoons, a newsreel and a double feature.