Operation Weserübung's effects on Sweden became strategically encircled by the German-Soviet pact. Since the Baltic states; Estonia, Latvia, and Lithuania; had been forced to accept "limited" Soviet forces on their soil, in the autumn of 1939, they were de facto more or less in a state of occupation. For Sweden and Finland, this meant that the only possible trade route to nations other than Germany and the Soviet Union, was through Petsamo harbour, in the far north of Finland. This seriously hampered the supply situation in both these nations. It also meant that an invasion of Sweden could be launched from almost any direction. Sweden
Finland–Russia border 2020. However, Lieutenant-General Vladimir Streltsov, deputy head of the Russian border service, noted that electronic surveillance will never replace the human element. The border can be crossed only at official checkpoints, and at least one visa is required for most people. Major border checkpoints are found in Vaalimaa and Nuijamaa, where customs services on both sides inspect and levy fees on imported goods. The northern endpoint of the border between Norway, Finland, and Russia form a tripoint marked by Treriksrøysa, a stone cairn near Muotkavaara (). On the south, the boundary is on the shore of Gulf of Finland, in