Simo "Simuna" Häyhä (Finnish pronunciation: ['simo? 'hæy??æ]; 17 December 1905 – 1 April 2002), nicknamed "White Death" (Russian: ????? ??????, Belaja smert; Finnish: valkoinen kuolema; Swedish: den vita döden) by the Red Army, was a Finnish sniper.
He is believed to have killed 500 men during the 1939–40 Winter War, the highest number of sniper kills in any major war.
He used a Finnish-produced M/28-30 rifle, a variant of the Mosin–Nagant rifle, and a Suomi KP/-31 sub machine gun.
His unit's captain Antti Rantama credited him with 259 confirmed kills by sniper rifle and an equal number of kills by sub machine gun during the Winter War.
Häyhä never talked about it publicly but estimated in his diary that he killed around 500 Red Army soldiers in the Winter War.