Factual error: The crazy lady, whose family (except the boy), were murdered by Indians, sings "Shall we gather at the river" after Jeremiah buries them. Only that wasn't written until 1864.
Jeremiah Johnson (1972)
1 factual error - chronological order
Directed by: Sydney Pollack
Starring: Robert Redford, Will Geer, Delle Bolton, Josh Albee
Other mistake: During the ‘rescue' mission to save the trapped wagon train, none of the riders are carrying packs of food or any supplies. One man is carrying a military unit banner on a pole. Unrealistic for this type of activity.
Del Gue: Amongst lnjuns... a tribe's greatness is figured on how mighty its enemies be.