Estonia in World War II When Soviet troops marched into Estonia the guns of both nations gave mutual salutes, and bands played both the Estonian anthem and the Internationale, the anthem of the USSR, at the time. Similar demands were forwarded to Finland, Latvia and Lithuania. Finland resisted, and was attacked by the Soviet Union on November 30. Because the attack was judged as illegal, the Soviet Union was expelled from the League of Nations on December 14. Finland held out in the Winter War until March 1940, when the Moscow Peace Treaty was signed. The first population loss for Estonia was the repatriation of
Gulf of Finland Kingdom (17%), Sweden (15%), Netherlands (8%), and Finland (7%). The remaining 9% are from Norway, Denmark, France, United States, Italy, Estonia, and Latvia. These objects present potential hazards to navigation, fishery, coastal construction, laying of submarine pipelines and cables, and the environment. Mines were laid in the gulf during World War I (38,932 units), the Russian Civil War, and the Soviet-Finnish War (1939–1940), with an estimated total number of 60,000; 85,000 more mines were set during World War II, and only a fraction of all those were eliminated after the wars. The ecological condition of the Gulf of Finland, Neva