Finland. The Soviets are beginning to digest the bitter lesson of their failure to cut Finland in two: they are suffering enormous losses. They therefore halt their advance north and concentrate a huge number of troops and tanks in the open terrain of the Karelian Isthmus (where Leningrad is located). The terrain (and the enormous balance of forces) favors the Red Army, which in February manages to break through the Mannerheim Line and penetrate Finland. The Finnish city of Viipuri will soon be besieged. This convinces the Finnish prime minister to travel to Moscow for negotiations. This time, the Russians are demanding much more than in 1939: the entire province of Karelia, additional territories in the north, and the use of the ports of Hanko and Helsinki. The Finns have no choice but to accept. In this war, the Soviets have lost eight soldiers for every Finn killed.
