During the American Civil War, the Union offered captured Confederate Soldiers the chance to serve in the west against the Indians. That really happened. This story is a fictional account of a group of those Confederates and their actions in the west. Like the real-life Galvanized Yankees, these men choose to do their duty. It's a pretty good movie, even if it is a typical 1950s war movie, with lots of drama and some romance. Still, better than many others, and does illustrate a real historical circumstance - Reb POWs were given the opportunity to serve in the west in return for a pardon, and told they would not be asked to fight against the Confederacy.