Estonia Latvia Lithuania Baltic countries pacts Finland The Soviet Union invaded Finland League of Nations Winter War some Finnish concessions of territory Poland Soviet Union
After the outbreak of war in Poland, Stalin threatened Estonia, Latvia, and Lithuania with military invasion, forcing the three Baltic countries to sign pacts that stipulated the creation of Soviet military bases in these countries. In October 1939, significant Soviet military contingents were moved there. Finland refused to sign a similar pact and rejected ceding part of its territory to the Soviet Union. The Soviet Union invaded Finland in November 1939, and was subsequently expelled from the League of Nations for this crime of aggression. Despite overwhelming numerical superiority, Soviet military success during the Winter War was modest, and the Finno-Soviet war ended in March 1940 with some Finnish concessions of territory.
