Modern classical music is music written in the 20th century and beyond. Although much of it draws heavily on earlier forms, modern composers also experimented with rejection of long-held ideas; notably, Arnold Schoenberg questioned the traditional notions of harmony with his twelve-tone system[?], and John Cage questioned the very definition of music with his use of chance and found sounds.
... that the war was not over. Marshal Henri-Philippe Petain had already signed the armistice treaty and the formation of Vichy France government had begun. De Gaulle also ...