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
Latvia–Russia border from the intersection point of the state borders of Latvia, Russia and Belarus, and ends with the joint borders of Latvia, Russia and Estonia. Latvia borders only one oblast of Russia, the Pskov Oblast. Russia borders seven Latvian municipalities. Crossing the border is allowed only at border controls. Most people need a visa on one or both sides of the border. Listed from north: Border crossings can also be done by air travel. The only international airport in Latvia is Riga International Airport which has scheduled flights among other places to Moscow and Saint Petersburg. The airports at Daugavpils, Liepāja,