Owen Thursday sees his new posting to the desolate Fort Apache as a chance to claim the military honour which he believes is rightfully his. Arrogant, obsessed with military form and ultimately self-destructive, he attempts to destroy the Apache chief Cochise after luring him across the border from Mexico, against the advice of his subordinates.
After fierce Roman commander Marcus Vinicius becomes infatuated with beautiful Christian hostage Lygia, he begins to question the tyrannical leadership of the despotic emperor Nero.
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.
