This is the Army is a 1942 American film directed by Michael Curtiz and based on the 1942 Broadway musical by Irving Berlin. Written as a morale booster during WWII, Berlin composed all 19 of the films songs. The story centers on Jerry Jones (George Murphy) and his son Johnny (Ronald Reagan). When Jones, a professional dancer, is drafted into the army during World War I, he receives permission (albeit begrudgingly) to stage a musical entitled Yip Yip Yaphank. Twenty-five years later, Johnny enlists in the army shortly after Pearl Harbor is attacked in the midst of World War II. He is then requested to stage a similar production to his father's, but larger and more opulent. The film was produced in order to spread the message of hope in wartime to American audiences, and features performances by Irving Berlin, Kate Smith, Frances Langford, and Joe Louis.