The war between the Soviet Union and Finland broke out.

1On October 30th, a war broke out between the Soviet Union and Finland.

After the fall of Poland, the Soviet Union signed mutual assistance treaties with Estonia, Latvia and Lithuania in order to further improve the strategic situation on the Baltic flank and the northwest border and ensure the security of Leningrad and Murmansk, and was able to station troops in important locations in the three countries.

1939 10, the Soviet Union asked the Finnish government to move the border near Leningrad northward for 20-30 kilometers on the grounds of ensuring the safety of its northwest border, especially Leningrad, and leased Hankou Port to the Soviet Union as a naval base for 30 years. The Soviet Union promised to allocate twice as much land as Leipola to Finland in exchange. The Finnish government rejected the Soviet proposal. There are constant border conflicts between the two sides here.

1939165438+1On the morning of October 30th, the Soviets attacked Finland, but the progress was not smooth. 1940 In February, the Soviet Union concentrated its superior forces and broke through Finland's solid defense line in mannering. From behind the Vyborg, Finland was defeated and made peace.

1940 March 12 was forced to sign the Sufen Peace Treaty with the Soviet Union in Moscow, Finland. According to the agreement, the whole karelian isthmus originally belonging to Finland, several islands in the Gulf of Finland, and parts of Sarah, Yayoi Kusama and Leibaqi Peninsula in the north were handed over to the Soviet Union, and Hanko Port was leased to the Soviet Union as a naval base for 30 years.