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Russia and Serbia
Germany and Austria-Hungary
France and Russia
Britain and France and Belgium
Japan and Britain -
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APR 6, 1915
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MAY 7, 1915
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The Treaty of Versailles ended World War I between Germany and the Allied Powers
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JUN 6, 1944
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AUG 6, 1945
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The aftermath of World War II was the beginning of an era defined by the decline of the old great powers and the rise of two superpowers: the Soviet Union (USSR) and the United States of America (USA), creating a bipolar world