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.
... in May 1942. Leader Pierre Villon[?] (Not to be confused with the current political party Front National in France that is right-wing conservative)
Interallie[?] - ...