Is the movie Jeremiah Johnson historically correct?

"Jeremiah Johnson," while inspired by historical events and figures, takes significant creative liberties. The film, based on the life of mountain man John Johnston, portrays a romanticized version of frontier life and Native American interactions. While it captures the ruggedness of the wilderness and the spirit of survival, many aspects, including timelines and characterizations, are fictionalized for dramatic effect. Therefore, it should be viewed more as a mythic representation of the era rather than a strict historical account.