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in March 1918, after Russia undergoes a Bolshevik Revolution and Lenin becomes leader, Russia surrenders to Germans and gives up a huge portion of Western Russia
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in 1922, the U.S. called for a treaty to set the ratio of naval ships between the U.S. (5), Britain (5), Japan (3), France (1.75), and Italy (1.75)
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the first revision of a WWI treaty