For 10 points, name this Scandinavian nation which fought the Winter War with the Soviet Union and was the site of the Helsinki Accords.
This country was obliged to defend its neighbor in the YYA Treaty. Its capital hosted a 1975 meeting that produced a declaration pledging respect for territorial integrity. A term named for this country refers to a nation being unduly influenced by a powerful neighbor. As this country gained independence, the White and the Red Guards fought a civil war. Nazi Germany helped it fight the Continuation War with a rival nation in conjunction with Operation Barbarossa. During one conflict, this country defended itself with the Mannerheim Line, but was still forced to give up the Karelian Isthmus to its eastern neighbor. For 10 points, name this Scandinavian nation which fought the Winter War with the Soviet Union and was the site of the Helsinki Accords.
This country was obliged to defend its neighbor in the YYA Treaty.
Republic of Finland [accept Soviet Union or Russia or U.S.S.R. until "1975 meeting"]