The Undefeated (1969 film)

The Undefeated is a 1969 American Western film directed by Andrew V. McLaglen and John Wayne uncredited and starring John Wayne and Rock Hudson. The film portrays events surrounding the French Intervention in Mexico and is also loosely based on General J. O. Shelbys escape to Mexico after the Civil War and his attempt to join with Maximilians forces.

Halfway there, Blue Boy notices that the tracks of a group of bandits indicate that they are planning an ambush on a group of travelers. Blue Boy and Thomas go to warn the travelers, who turn out to be the Confederates. Despite their differences, the Americans repel a group of Mexican bandits who attack the Confederate wagon train, with Thomas riders saving the day.The two factions celebrate at a Fourth of July party and relive the war through a drunken brawl. They then split and go their separate ways. Meanwhile, Langdons daughter and Blue Boy have fallen in love. ........

Source: Wikipedia