During the Civil War, a Union spy, Andrews, is asked to lead a band of Union soldiers into the South so that they could destroy the railway system. However, things don't go as planned when the conductor of the train that they stole is on to them and is doing everything he can to stop them. Based on a true story.

A greedy rancher is charging excessive prices for access to the area's only water supply, extorting the smaller ranchers in the area. A water diviner teams up with a cattle buyer to force the villain to share the water with his neighbors.

Lt. Col. Kirby Yorke is posted on the Texas frontier to defend settlers against depredations of marauding Apaches. Col. Yorke is under considerable stress by a serious shortage of troops of his command. Tension is added when Yorke's son (whom he hasn't seen in fifteen years), Trooper Jeff Yorke, is one of 18 recruits sent to the regiment.

The John Wesley Powell expedition of 1869 explores the dangerous Colorado River, withstands internal dissension, and finally discovers the Grand Canyon.

A Union Cavalry outfit is sent behind confederate lines in strength to destroy a rail supply center. Along with them is sent a doctor who causes instant antipathy between him and the commander. The secret plan for the mission is overheard by a southern belle who must be taken along to assure her silence.