Copperhead is an independent Canadian/American film directed by Ron Maxwell. It stars Billy Campbell who replaced Jason Patric partway through filming. Shot at Kings Landing Historical Settlement in New Brunswick, Canada and set in upstate New York, it was released June 28, 2013. The film is based on a 19th-century novel, The Copperhead, by Harold Frederic. The title refers to Northern opponents of the American Civil War, known as Copperheads.