Hat tip to A Continuous Lean . . .
"One of the Missing is the late Tony Scott’s first film about a Confederate soldier on a scouting mission during the Civil War. The story was written by Ambrose Bierce (an equally adventurous and talented man) in 1888 and is an incredibly powerful piece of American fiction that led to a stunning (and now, a rather uncomfortable) directorial début by Tony Scott." ~ ACL
I was not familiar with this film, nor the story. Apparently, the film reversed characters from the written story in which the sniper was a yankee facing a Confederate enemy.