First of all, for the Soviet Union, the small town of Vyborg is the bridgehead to defend Leningrad. Vyborg, located at the northwest of Leningrad 130 km, is a very important military town. In order to develop westward, Russia pushed back the Swedish army near Vyborg. On the basis of seizing a large amount of land in eastern Sweden, the czar established the Russian vassal country, the Grand Duchy of Finland. In order to develop westward, the czar actively established a military town, Viborg, in order to buy St. Petersburg to protect the East.

Later, Finland used the October Revolution of Russia to gain independence. They are actively building Viborg, the second largest city in Finland. After the founding of the Soviet Union, Lenin also allowed Finland to become independent. Although the population of Vyborg is only 80,000, the city is of great significance to Finland and the Soviet Union. Vyborg is only over 30 kilometers away from the border between the Soviet Union and Finland. Once it falls, the whole Finland will be under the Russian front, and its strategic position can be imagined.

1939 In April, the Soviet leadership decided to wage war against Finland. The result is very surprising. The Finnish army clung to the fortress, and the Soviet army won it at the cost of 70,000 deaths, 40,000 missing, 200,000 injured and 20,000 frostbite, forcing Finland to make peace. The Soviet Union signed a treaty with Finland, and Finland was forced to cede 10% of its territory, including Vyborg.

Later, when the Germans attacked the Soviet Union, Finland sided with Germany and quickly resumed the management of Vyborg. In the past five years, Finns have been on the front line of Germans against the Soviet Union. Later, the Soviet Union launched a big counterattack and drove the Germans out of the Soviet Union in one fell swoop. 1944, the Soviet army regained control of Vyborg and pushed the front into Germany in one fell swoop. In this way, with the Soviet Union becoming the winner of the anti-fascist war, Vyborg has been controlled by the Soviet Union and has become an important territory in its western region.