On 30 November 1939 the Red Army invaded Finland. Despite overwhelming superiority, the advances of the invaders, along the 900 mile front, were checked and the Soviet troops suffered disastrous defeats.
2. Between 1 and 21 February 1940 the Red Army launched its decisive attack, which broke through the Finnish fortified line, north of Leningrad. The way to Finland’s heartland lay open.
3. On March 12, 1940 the Treaty of Moscow was signed. Finland ceded part of Karelia, part of Salla, the Kalastajansaarento peninsula in the far north and four islands in the Gulf of Finland.
Photos attribution3. Jniemenmaa, GFDL or CC-BY-SA-3.0, via Wikimedia Commons