Surviving the Bear Attack
In real life, Hugh Glass killed the bear with help from his trapping partners, Fitzgerald and Bridger. Unlike the movie scene in which DiCaprio’s character killed the bear by himself. In reality, Glass was left badly injured and unconscious.
Wikipedia
The expedition leader, Henry, was convinced that Glass wouldn’t survive. He got two volunteers to stay with Glass until he died and were then supposed to bury him. Bridger and Fitzgerald agreed to do it and started digging his grave.