Sources
https://www.history.com/topics/monroe-doctrine
https://www.ducksters.com/history/us_1800s/monroe_doctrine.php
https://www.loc.gov/rr/program/bib/ourdocs/Monroe.html
https://www.history.com/this-day-in-history/monroe-introduces-bold-new-foreign-policy
http://www.datesandevents.org/american-timelines/james-monroe-timeline.htm
https://www.history.com/topics/us-presidents/john-quincy-adams
http://alisynhistory.blogspot.com/2014/10/
https://newsela.com/read/lib-ushistory-roosevelt-latin-america