One of the narratives is that Russia on multiple occasions during WW2 attempted to invade and conquer Finland only to get their asses kicked by epic snipers. No one likes to talk about who the Nordic people were willing to align themselves with, or that Finland made a push east when Germany did.
The USSR invaded Finland, took a chunk of land, stopped/was stopped, whatever story you wish to follow. Finland attacked when Germany did, attempting to reclaim territory and more. They got beat back and lost even more land. By the end of WW2 they lost 9% of their land, and many lives.
The west post WW2 hates the soviets, and any story involving them will always have some sort of bias or exaggeration, who knows the reality of it.
They also leave out everything that went BEFORE the invasion of Finland, and pretend that those mean Soviets just wanted to conquer Finland because… Reasons.
Leningrad, a major urban center of great strategic importance was just twenty miles from the Finnish border.
Finland, had been a part of the Russian empire for over a century, and had gained their independence when Russia was engulfed in a civil war, and couldn’t really argue with where borders would be drawn.
Given those facts, the Soviet Union wanted security for Leningrad, and suggested moving the border further west near Leningrad, IN RETURN for a land swap further north where it wasn’t a security issue. Overall, Finland stood to gain from the land swap, as the territory the SU was willing to cede to Finland, was twice as large as the territory they wanted from Finland.
The Finns refused the offer, though the government was divided and even Mannerheim thought they should take it.
So left out of options and worrying about a war in the near future with either Germany or the Allies, the Soviet Union went to war.
Ultimately, the concessions the Finns had to make after losing the war, was far worse than the deal they had been offered in the autumn of 1939.
TLDR: The winter war against Finland was caused as much by Finns being retards as
it was by Tussian territorial ambitions.
Unfortunately, after having some sense slapped into them after WW2, the Finns have returned to being retarded having learned absolutely fuck all.