An army doctor, with no combat experience, is forced to take command of a cavalry troop escorting a wagon train through hostile Indian country when the unit's commanding officer dies.An army doctor, with no combat experience, is forced to take command of a cavalry troop escorting a wagon train through hostile Indian country when the unit's commanding officer dies.An army doctor, with no combat experience, is forced to take command of a cavalry troop escorting a wagon train through hostile Indian country when the unit's commanding officer dies.