Eager to serve, the director Frank Capra had enlisted in the Army shortly after Pearl Harbor, and had agreed to make training films for recruits. Capra knew that he had to find an explicitly American way of selling the war to soldiers and to the public as well; he became one of the key figures in the largest movie-propaganda campaign the government has ever undertaken. A number of Hollywood directors signed up, and, as Mark Harris writes in “Five Came Back: A Story of Hollywood and the Second World War,” the most prominent among them had different ambitions and needs.