The Winter War was a military conflict between the Soviet Union and Finland in 1939–1940. It began with the Soviet invasion of Finland on 30 1939, . The ‘Winter War’ of 1939-1940 or the Russo-Finnish War was fought between the Soviet Union and Finland. The Soviet Union claimed parts of Finnish territory . On 26, 1939, the Soviets faked the Finnish shelling of the Russian town of Mainila. In the aftermath of the shelling, they demanded that the Finns . Released theatrically in 1940 by Emerson Yorke, an independent producer in New York. This humanitarian reel, made on behalf of the Finnish Relief Fund, .