https://en.m.wikipedia.org/wiki/Winter_War
Technically it ended in a peace treaty, but Finland only gave up 11% of their land, when Russia intended to conquer all of it. I call that a win.
Russian forces outnumbered Finland's by 3 to 1, and had 30x as many vehicles. Finnish forces lasted much longer than Russia expected.
Suck it Sweden.
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Edited by LowIQPlayz3445: 2/28/2016 7:45:51 PMThe Finnish had a really badass af sniper. He got like 500(?) confirmed kills, didn't use a scope because it fogged up, an ate ice so the Russians couldn't see his breath. It took a morter(maybe air) strike just to [i]incapacitate[/i] him. He woke up in the hospital after the treaty was signed.