What was the Native Americans' involvement in World War 2?

Probably the most profound effect that Native Americans had on WWII was in the Pacific theater. It was here that the code talkers were introduced. The Japanese never broke any code that the code talkers used. Matter of fact, during the cold war, a little known bit of history is that the Soviet Union went thru many efforts to procure the languages that were used by our code talkers and taught it to their GRU operatives. This way if we tried to do that to them, they could counter it. Also one of the Marines that raised the flag at Iowa Jima was Ira Hayes.