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 Haapasaari, Helsinki, Hanko, Åland, Saimaa Canal. Border controls on land exist only on the Russian border. See Finland–Russia border. The only permanent border control on airports is on the Helsinki airport (although occasional controls can take place for charter flights on other airports). 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