Completed the following sentence: In 1939 the Soviet Union attacked Finland starting the Winter War. 1940 Moscow Peace Treaty<unk> handed the eastern half of Finnish Karelia to the Soviet Union. About 400,000 people, virtually the entire population, had to be relocated within Finland. 1941<unk>Finland<unk>
<unk> <unk> <unk> <unk> 1941<unk>1944<unk>