Salpalinja
Overview
 
The Salpa Line or its official name, Suomen Salpa (Finland's Bolt), is a bunker line on the eastern border of Finland
Finland
Finland , officially the Republic of Finland, is a Nordic country situated in the Fennoscandian region of Northern Europe. It is bordered by Sweden in the west, Norway in the north and Russia in the east, while Estonia lies to its south across the Gulf of Finland.Around 5.4 million people reside...

. It was built during the Interim Peace
Interim Peace
The Interim Peace was a short period in the history of Finland during the Second World War. The term is used for the time between the Winter War and the Continuation War, lasting a little over a year, from 13 March 1940 to 24 June 1941...

 between the Winter War
Winter War
The Winter War was a military conflict between the Soviet Union and Finland. It began with a Soviet offensive on 30 November 1939 – three months after the start of World War II and the Soviet invasion of Poland – and ended on 13 March 1940 with the Moscow Peace Treaty...

 and the Continuation War
Continuation War
The Continuation War was the second of two wars fought between Finland and the Soviet Union during World War II.At the time of the war, the Finnish side used the name to make clear its perceived relationship to the preceding Winter War...

 to defend Finland against a possible Soviet invasion. The line is 1200 km long, stretching from the Gulf of Finland
Gulf of Finland
The Gulf of Finland is the easternmost arm of the Baltic Sea. It extends between Finland and Estonia all the way to Saint Petersburg in Russia, where the river Neva drains into it. Other major cities around the gulf include Helsinki and Tallinn...

 to Petsamo in northern Finland (now Pechenga
Pechengsky District
Pechengsky District is an administrative and municipal district , one of the five in Murmansk Oblast, Russia. It is located to the northwest of the Kola Peninsula on the coast of the Barents Sea and borders with Finland in the south and southwest and with Norway in the west, northwest, and north...

, Russia
Russia
Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...

). It never saw military action because the Soviet offensive in 1944 was stopped at the VKT-line
VKT-line
The VKT-line or Viipuri–Kuparsaari–Taipale line was a Finnish defensive line on Karelian Isthmus during the Continuation War, spanning from Viipuri through Tali and Kuparsaari along the northern shore of Vuoksi River, Suvanto and Taipaleenjoki to Taipale on the western shore of Lake Ladoga, using...

 on the Karelian Isthmus
Karelian Isthmus
The Karelian Isthmus is the approximately 45–110 km wide stretch of land, situated between the Gulf of Finland and Lake Ladoga in northwestern Russia, to the north of the River Neva . Its northwestern boundary is the relatively narrow area between the Bay of Vyborg and Lake Ladoga...

.
 
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