http://www.sparknotes.com/history/american/vietnamwar/summary.html
http://www.digitalhistory.uh.edu/era.cfm?eraID=18&smtid=1
http://alphahistory.com/vietnam/chinese-and-soviet-involvement/
http://www.shmoop.com/vietnam-war/lyndon-b-johnson.html
http://history1900s.about.com/od/vietnamwar/a/vietnamtimeline.htm
http://ows.edb.utexas.edu/site/emilys-site/kent-state-background-information
http://vietnamawbb.weebly.com/invasion-of-cambodia.html
http://www.pbs.org/wgbh/amex/vietnam/trenches/my_lai.html
http://history1900s.about.com/od/1960s/qt/tetoffensive.htm
http://www.cnn.com/2013/10/04/world/asia/vietnam-general-death/