Latvia states of Northern and Eastern Europe were divided into German and Soviet "spheres of influence". In the north, Latvia, Finland and Estonia were assigned to the Soviet sphere. A week later, on 1 September 1939, Germany and on 17 September, the Soviet Union invaded Poland. After the conclusion of the Molotov-Ribbentrop Pact, most of the Baltic Germans left Latvia by agreement between Ulmanis' government and Nazi Germany under the Heim ins Reich programme. In total 50,000 Baltic Germans left by the deadline of December 1939, with 1,600 remaining to conclude business and 13,000 choosing to remain in Latvia. Most of
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