Barbed Wire is a 1927 American silent romance film set in World War I. It stars Pola Negri as a French farmgirl and Clive Brook as the German prisoner of war she falls in love with. The film was based on the 1923 novel The Woman of Knockaloe by Hall Caine. Unlike the original novel, which is set at the Knockaloe internment camp in the Isle of Man, the film takes place in Normandy, France. Some plot alterations were made in the adaptation, including most importantly the insertion of a happy ending.