3. Finland vs. Soviet Union (Winter War)
In November 1939, the Soviet Union invaded Finland, initiating the Winter War. Despite being heavily outnumbered, Finnish forces employed innovative tactics and leveraged their knowledge of the harsh winter terrain to inflict significant losses on the Soviet army. Notable engagements included the Battle of Suomussalmi, where Finnish troops achieved a decisive victory against superior Soviet forces. Although Finland ultimately ceded territory under the Moscow Peace Treaty in March 1940, their valiant defense garnered international admiration. (britannica.com)
