Other mistake: In the shot where the men are playing a game of baseball, if you look carefully in the background you will see that cars are driving down the highway. Considering that this movie was supposed to take place in the 1800's...
The Great Northfield, Minnesota Raid (1972)
1 mistake
Directed by: Philip Kaufman
Starring: Robert Duvall, Cliff Robertson, R.G. Armstrong, Luke Askew
Genres: Western
Chief detective: From now on, you men are farmers. Your job is to plow them under like manure. Now get those sons of bitches.