In the years of the Great War, a new anti-war movement grew up in Britain, made up of people moved by Christian, socialist, Irish nationalist, or pacifist ideas. Thousands of men refused to obey the order to fight; some spent years in prison. This chapter examines their use of song to keep morale up and express their views on the world’s events. Sources range from graffiti still preserved on the walls of prisons, to private letters and diaries and the published Conscientious Objector’s Songbook which is in the collection of the Bradford Peace Museum.