When reading about the Russo-Finnish Winter War I found this very interesting.

In addition, to the surprise of both the Soviet leadership and the Finns, it turned out that the majority of the Finnish Socialists did not support the Soviet invasion but fought alongside their compatriots against the common enemy. Many Finnish Communists had moved to the Soviet Union in the 1930s to "build Socialism," only to end up as victims of Stalin's Great Purges, which led to widespread disillusion and even open hatred of the Soviet regime among Socialists in Finland. This partial healing of the wounds and rifts after the Civil War in Finland (1918), and Finland's language strife, is still referred to as "the Spirit of the Winter War," although it should also be noted that many communists were not allowed to fight in Finland's conscription army because of their political background.

Soviet arrogance and/or incompetence was an important factor. The attackers weren't expecting much of a struggle, and due to Stalin's purges, the commanders of the Red Army had suffered 80% peacetime losses. These were commonly replaced by people less competent but more pleasing to their superiors, and tactics which were obsolete by World War I were sometimes witnessed. Tactics were strictly "by the book," as a failed initiative otherways carried a high risk of execution. The Soviet army was also far less well prepared for winter warfare, particularly in forests, and heavily used vulnerable motorized vehicles. The so-called "Raatteentie Incident," during the month-long Battle of Suomussalmi, where one Soviet division was defeated after marching on a forest road straight into an ambush with vastly outnumbered Finnish soldiers, is still used in military academies as an example of what not to do.


http://www.absoluteastronomy.com/encyclopedia/w/wi/winter_war.htm
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For the first time I have seen "History" at close quarters,and I know that its actual process is very different from what is presented to Posterity. - WWI General Max Hoffman

I don´t know how many top foreign communists were asked to visit Moscow by Stalin or the Party in the 1930´s but anyway several of them never returned, I know many Finns never came back and also several Polish ones.

the Finnish communists knew what would happen to them because " a true communist did not live outside USSR" in Stalin´s view, they were spies or the sort. Some kinda reason to send them to Gulag anyway. So they decided if not take part in Winter War at least not interfere by causing sabotage.

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You have to wonder at how gullible some Communists were. That they wouldn't notice what had happen to others and Stalin's leanings towards killing people with no real reason other then in his head.

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For the first time I have seen "History" at close quarters,and I know that its actual process is very different from what is presented to Posterity. - WWI General Max Hoffman

If I recall correctly Tito was the only leader ever to have refused to pack his bags and go to Moscow once the invitation was sent....that is post-WW2 of course!

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Tito did seem to know what Stalin was really about. One of the reasons he outlived him LOL.

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For the first time I have seen "History" at close quarters,and I know that its actual process is very different from what is presented to Posterity. - WWI General Max Hoffman