The Ghost Brigade

During the Civil War, Union Captain John Harling receives orders to investigate a series of gruesome, unexplained mass murders of both Union and Confederate soldiers. Harling agrees, but insists on enlisting the help of his old mentor from West Point, Confederate Colonel Nehemia Strayn. The two officers must overcome their bitter differences and join forces in order to battle the supernatural forces that are destroying entire regiments of troops and threatening their own lives.