You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
alternatehistory.com
What if there was no Winter War in 1939? The two things I can think of is that everyone would think they were tougher than they were but the Russians would be weaker than OTL as they wouldn't have learned the lessons they did in the Winter War. OTOH they do have the men and tanks they lost in that war. I think the Nazis still invade but do somewhat better. They may even take Leningrad but not Moscow or Stalingrad, I don't think.