Badman's Country (1958)

Pat Garrett arrives in Abilene where he catches five of Butch Cassidy's gang. He calls in Wyatt Earp and Bat Masterson and they learn there is a half million dollar shipment of money arriving by train and Cassidy is amassing enough men to take it. They also realize he has tapped the telegraph line and they send a false message saying the money is already in the Abilene bank. But the townspeople not only refuse to fight but they release the prisoners trying to avoid a gungight in their town.