The following two films will follow the events of the first film with the journey west and the settling of the American frontier.An anti-war story, The Downslope focuses on a bitter, strategic series of Civil War battles in the Shenandoah Valley between young Union General George Armstrong Custer and Confederate Colonel John Singleton Mosby (known as the Gray Ghost for his stealth strategies). His cavalrymen, known as Mosby's Rangers, continually outsmarted the much-larger enemy forces in a sequence of raids, which enraged Custer and eventually created a fierce cycle of revenge between the two men.
According to the report Kubrick spent years researching the conflict with Civil War historian Shelby Foote. He made maps and notes planning the film shoot, with everything based on historical events.
The last Kubrick screenplay to be shot post-mortem was Speilberg's A.I. Artificial Intelligence.