Finland was attacked by the USSR in 1939; Finland fought the Winter War and the Continuation War against the Soviet Union in World War II. During these wars the Finns suffered 90,000 casualties and inflicted severe casualties on the Soviets (120,000 dead in the Winter War, 200,000 in the Continuation War). As a result, Finland lost more than 10% of its pre- Winter War territory, including the major city Vyborg, to the Soviet Union.