Historische Organisatie
Finland
Finland
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Mainila incident escalates the Soviet-Finnish crisis
📅 26 November 1939The Soviet government accused Finland of shelling Soviet positions and used the incident to intensify the crisis. Finland denied responsibility; the event became a pretext for terminating the...
Soviet Union invades Finland, beginning the Winter War
📅 30 November 1939Soviet forces crossed into Finland after negotiations over border security and territorial concessions failed. The invasion was an act of aggression that produced heavy civilian and military losses...
The Soviet Union invades Finland, beginning the Winter War
📅 30 November 1939Soviet forces crossed the Finnish border after failed negotiations over security near Leningrad. The war exposed the costs of Stalin’s coercive diplomacy and the Red Army’s weaknesses after the...
League of Nations expels the Soviet Union
📅 14 December 1939The League condemned the Soviet invasion of Finland and expelled the USSR. The decision exposed the weakness of collective security and the limits of Soviet claims to defend peace through...
Finland and the Soviet Union sign the Moscow Peace Treaty
📅 12 Maart 1940The treaty ended the Winter War and transferred Finnish territory, including the Karelian Isthmus, to the Soviet Union. Soviet security demands gained territory but at high military and diplomatic...