The Monroe Doctrine (video)
The link address is: https://www.khanacademy.org/humanities/ap-us-history/period-4/apush-politics-society-early-19th-c/v/the-monroe-doctrine
The link address is: https://www.khanacademy.org/humanities/ap-us-history/period-4/apush-politics-society-early-19th-c/v/the-monroe-doctrine