Art changed drastically after World War I. Many artists were influenced by the atrocities they witnessed during the war, and they sought to express these experiences through their work. Literature, music, and the visual arts all changed as a result of the war. For example, writers began to experiment with various styles of writing that expressed the chaos and confusion of war. Visual artists began to create abstract art that conveyed the emotions of war. And composers started to write music that was more angry and dissonant. These changes in art were reflective of the changes that were happening in society at large.
Hope this helps :)