The war between the USSR and Finland in 1939–40. Heavily outnumbered by invading Soviet troops, the Finns were defeated and forced to cede western Karelia to the Soviet Union.
冬季战争（1939-1940年的苏芬战争；因入侵的苏军人数远超过芬兰，芬兰战败，被迫把卡累利阿西部割让给苏联）。亦称RUSSO-FINNISH WAR