During the last winter of the Civil War, cavalry officer Amos Dundee leads a contentious troop of Army regulars, Confederate prisoners and scouts on an expedition into Mexico to destroy a band of Apaches who have been raiding U.S. bases in Texas.

After the Civil War, ex-Union Colonel John Henry Thomas and ex-Confederate Colonel James Langdon are leading two disparate groups of people through strife-torn Mexico. John Henry and company are bringing horses to the unpopular Mexican government for $35 a head while Langdon is leading a contingent of displaced southerners, who are looking for a new life in Mexico after losing their property to carpetbaggers. The two men are eventually forced to mend their differences in order to fight off both bandits and revolutionaries, as they try to lead their friends and kin to safety.

The story of the peace mission from the US cavalry to the Cheyenne Indians in Wyoming during the 1870s. The mission is threatened when a civilian surveyor befriends the chief's son and falls for the chief's daughter.

The gangster Colorado kidnaps Marshal McKenna. He believes that McKenna has seen a map which leads to a rich vein of gold in the mountains and forces him to show him the way. But they're not the only ones who're after the gold; soon they meet a group of "honorable" citizens and the cavalry crosses their way too - and that is even before they enter Indian territory.

Train with medical supplies and small U.S. Army unit is heading through Rocky mountains towards plagued Fort Humboldt. Among its passengers are territory governor, priest, doctor and U.S. Marshal with his prisoner, John Deakin. However, nothing on that train is what it seems.

When the government agency fails to deliver even the meager supplies due by treaty to the proud Cheyenne tribe in their barren desert reserve, the starving Indians have taken more abuse than it's worth and break it too by embarking on a 1,500 miles journey back to their ancestral hunting grounds. US Cavalry Capt. Thomas Archer is charged with their retrieval, but during the hunt grows to respect their noble courage, and decides to help them.