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History.com Staff. (2009). Pearl Harbor. Retrieved April 23, 2016.
History.com Staff. (2009). Tuskegee Airmen. Retrieved April 23, 2016.
History.com Staff. (2009). Yalta Conference. Retrieved April 23, 2016
History.com Staff. (2009). Operation Barbarossa. Retrieved April 23, 2016
Operation Overlord - History Learning Site. (n.d.). Retrieved April 23, 2016
Operation Sealion - History Learning Site. (n.d.). Retrieved April 23, 2016.
QuizletQWait('dom',function(){document.getElementById('PrintLogo').setAttribute ('src',"https://quizlet.com/a/i/global/logo_print.du83.png")});. (n.d.). Retrieved April 23, 2016
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The Fall of Berlin, 1945. (n.d.). Retrieved April 23, 2016
The Munich Conference. (n.d.). Retrieved April 23, 2016
The Tehran Conference, 1943 - 1937–1945 - Milestones - Office of the Historian. (n.d.). Retrieved April 23, 2016
World War II | HistoryNet. (n.d.). Retrieved April 23, 2016.