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
Norway–Russia border of the Norwegian Border Commissioner, while the Russian side is patrolled by the Border Guard Service of Russia. Two-thirds of the border follows two rivers, the Pasvikelva and Jakobselva. The border was defined as a march in a treaty in 1326 and separated which parts of the Sami could be taxed by Norway and Russia. The border line was defined by a treaty in 1826 and essentially remains the same border today. In 1920 Petsamo was ceded to Finland and the border became part of the Finland–Norway border. Petsamo was ceded to the Soviet Union in 1944 and the Norway–Soviet