After the American Civil War, mercenaries travel to Mexico to fight in their revolution for money. The former soldier and gentleman Benjamin Trane meets the gunman and killer Joe Erin and his men, and together they are hired by the Emperor Maximillian and the Marquis Henri de Labordere to escort the Countess Marie Duvarre to the harbor of Vera Cruz.

Alvin York a hillbilly sharpshooter transforms himself from ruffian to religious pacifist. He is then called to serve his country and despite deep religious and moral objections to fighting becomes one of the most celebrated American heroes of WWI.