True Whispers (2002)

Exploring the personal and heartfelt story of the Navajo code talkers, this documentary tells the stories of the young Navajo men recruited from harsh government boarding schools into the Marines during World War II. From 1942-1945, the code talkers devised an unbreakable code in their native language and transmitted vital messages in the midst of combat against the Japanese.

Unfortunately the movie True Whispers is not yet available on HBO Max.