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The Second Sino-Japanese War was a military conflict fought primarily between the Republic of China and the Empire of Japan from 1937 to 1945.
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The Invasion of Poland, also known as the September Campaign, or the 1939 Defensive War in Poland and alternatively the Poland Campaign or Fall Weiss in Germany , was a joint invasion of Poland by Nazi Germany, the Free City of Danzig, the Soviet Union, and a small Slovak contingent, that marked the beginning of World War II in Europe.