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https://history.state.gov/milestones/1921-1936/naval-conference In the wake of World War 1, leaders in the international community sought to prevent the possibilitry of another war,.
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http://www.britannica.com/topic/Communist-Party-of-the-Soviet-Union The Communists Party arose in opposition to both capitalism and the socialists.
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http://alphahistory.com/weimarrepublic/ruhr-occupation/ France & Belgium take over the Ruhr area hoping to force Germany to make reparations for WWI.
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http://www.biography.com/people/adolf-hitler-9340144 Nazis, led by Hitler try to overthrow the German government but fail, this was known as the Beer Hall Putsch.
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http://www.dw.com/en/last-french-regiment-to-leave-germany/a-17197317 French troops withdraw from Germany.
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http://www.prlib.ru/en-us/history/Pages/Item.aspx?itemid=1224 The Soviet Union and Germany sign the Treaty of Berlin, which allow either country to remain neutral if one or the other is attacked by another country.