sources
https://www.mtholyoke.edu/acad/intrel/interwar.htm
http://iws.collin.edu/kwilkison/Resources%20for%20Students/ForeignPolicy.html
https://www.mtholyoke.edu/acad/intrel/interwar.htm
http://iws.collin.edu/kwilkison/Resources%20for%20Students/ForeignPolicy.html