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
Borders of Finland Borders of Finland The borders of Finland are the dividing lines between it and the neighbouring countries of Norway, Russia and Sweden. The border between Norway and Finland is 736 kilometers (457 mi) long. It is a land and river border between two tripoints. The western tripoint is marked by Treriksröset, a stone cairn where both countries border Sweden. The eastern tripoint is marked by Treriksrøysa, a stone cairn where both countries border Russia. The border was defined in a 1751 treaty, which also defined the Swedish–Norwegian border. In the period 1738–1751 field investigations and negotiations took place on the