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Simo Häyhä achieved his legendary status as the "White Death" during the Winter War, a fierce conflict between Finland and the Soviet Union from 1939 to 1940. Renowned for his exceptional marksmanship and stealth, Häyhä is credited with eliminating over 500 enemy soldiers, primarily using a Finnish-made Mosin-Nagant rifle. His exploits made him a national hero and a symbol of Finnish resistance against overwhelming odds.