Why did the Soviet army perform well at the Battle of Khalkhin Gol, but perform poorly in Finland not long after?

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The Red Army achieved a decisive victory over the Japanese at the Battle of Khalkhin Gol in September 1939, yet suffered immense difficulties later that year when invading Poland and notably, Finland. The poor performance of the Red Army in Finland is often chalked up to Stalin’s purges of 1937-38. Yet surely this would’ve also affected the Red Army at the time of Khalkhin Gol? What accounts for this disparity?


Geography was very important factor there, as well as nature of war. They made several episodes talking about khaklin gol and winter war, there you can see the main differences.

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Incomplete sentence there.

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