A Finnish sniper during the 1939–40 Winter War known as the "White Death" from his habit of lying in the snow wearing snow camouflage and a white face mask, waiting for a target to appear. Antti Rantamaa, who served as a field chaplain in Häyhä's regiment, credited him with 259 confirmed kills by sniper rifle and an equal number of kills by submachine gun during the war.[15] In total, he killed between 505 and 542 soldiers with an iron sights-only SAKO M/28-30 (a Finnish variant of the Mosin–Nagant rifle), as well as a submachine gun while fighting as a group leader with the rest of his unit. All of Häyhä's kills were made over the course of fewer than 100 days, before he was seriously wounded—an average of just over 5 per day, with the highest daily count numbering 25 kills—at a time of year with few daylight hours.