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http://latinamericanhistory.oxfordre.com/view/10.1093/acrefore/9780199366439.001.0001/acrefore-9780199366439-e-41

http://www.e-ir.info/2013/06/14/us-foreign-policy-in-latin-america/

https://www.biography.com/people/pancho-villa-9518733

https://www.biography.com/people/jos%C3%A9-mart%C3%AD-20703847

https://www.britannica.com/biography/Maximilian-archduke-of-Austria-and-emperor-of-Mexico

http://www.pbs.org/latino-americans/en/timeline/