The corps was deployed during the postwar period on the Karelian Isthmus with the headquarters in the city of Vyborg (Leningrad Military District).
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After the Soviets saw that they had failed in the Battle of Tali-Ihantala against the Finnish defenders in the late June and early July 1944, they tried to break the Finnish positions in Vuosalmi (now Druzhnoye) and encircle the southern part of the Finnish forces in the Karelian Isthmus.
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The Finnish artillery fired altogether over 122,000 rounds of ordnance in Äyräpää and Vuosalmi, from June 20 to July 17, 1944 – same amount, as in the Battle of Tali-Ihantala, which was fought during exactly the same time period in a near vicinity, on the relatively narrow Karelian Isthmus of Finland.
4 August, 1951 in 1 hour and 30 minutes electric power dispatcher gave command to bring the current in the contact network of the first electrified in the Karelian Isthmus area Leningrad - Zelenogorsk.
Taipale at the Mannerheim Line, then approximately 20 kilometers from the Soviet border, became known for heavy fighting during the Winter War, and was held by the Finnish forces until the end of that war, when all of the Karelian Isthmus was ceded to the Soviet Union and had to be evacuated in haste.
If the Red Army would not have been stopped here, the Finnish forces fighting on the Karelian Isthmus would have been left between two Soviet armies on the narrow Isthmus, in the area limited by the Gulf of Finland in the south, and Lake Ladoga in the north.
Earlier, during the Winter War, several Finnish machine gun operators on the Karelian Isthmus theatre became mentally unstable after repelling several unsuccessful Soviet human wave assaults on fortified Finnish positions