Sources

https://www.historyonthenet.com/effects-of-world-war-1/

https://www.theguardian.com/world/gallery/2008/nov/08/first-world-war-key-figures-gallery

https://www.shmoop.com/wwi/timeline.html

http://www.americaslibrary.gov/jb/jazz/jb_jazz_wwi_1.html