During the Winter War, the amount of Soviet Union soliders that died or went missing was five times more than Finland's.

The story behind the answer

True. In the 1939-40 Winter War, about 26,000 Finns were killed or missing, while Soviet estimates range from roughly 130,000 to over 160,000—about five times as many. The disparity came from Soviet command failures after Stalin’s purges, poor winter equipment, and rigid tactics.

Finland maximized home-terrain advantages: ski troops in white camouflage, ambushes in forests, and "motti" tactics that chopped up long Soviet columns. They even popularized the "Molotov cocktail," mocking Soviet foreign minister Vyacheslav Molotov. Though Finland ultimately ceded territory, the conflict exposed serious Red Army weaknesses just before Nazi Germany’s invasion. Memory hook: small, mobile, and winter-ready Finland made the massive but ill-prepared Red Army pay roughly fivefold in lives.