Finland fought two wars against the Soviet Union during World War II: the
Winter War and the
Continuation War. The Finns suffered 89,108 dead or missing military personnel during these wars
[4][5][6] but inflicted severe casualties on the Soviet Union: 126,875–167,976 dead or missing during the Winter War
[7][8] and 250,000–305,000 dead or missing during the Continuation War.
[6][8] Finland ceded 11% of its territory - including the major city
Vyborg - to the Soviet Union, but prevented the Soviets from annexing Finland into the USSR.