It’s 1939, and the short but bitter Winter War between Finland and the Soviet Union rolls on. Crack Finnish sniper Simo Häyhä pulls back the bolt on his Mosin-Nagant rifle, and the stealthy action is almost inaudible. He takes careful aim across the snow-covered landscape and draws a bead on a luckless Soviet soldier. He then gently squeezes his trigger. A shot echoes through the chilled air, and another enemy topples to the ground – stone dead.