The Salpa Line , or its official name, Suomen Salpa , is a bunker line on the eastern border of Finland. It was built during the Interim Peace between the Winter War and the Continuation War to defend Finland against a possible Soviet invasion. The line is 1,200 km long, stretching from the Gulf of Finland to Petsamo in northern Finland . It never saw military action because the Soviet offensive in 1944 was stopped at the VKT-line on the Karelian Isthmus. The fortifications of the Salpa Line were much stronger than those of the Mannerheim Line.
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