During the Battle of Helsinki, on 12 April 1918, advancing German troops executed ca. 40–50 men they had apprehended, who mostly belonged to the Red Guards. The executions took place around 8 p.m. at a bog that located halfway between the Vihdintie Roundabout and Riistavuori. When the locals had fetched from the pile of bodies their family members, the rest, people from out of town, were transported to a pit in an uninhabited location near-by. The grave was located along an artillery lane close to Base no. XXIV of the Krepost Sveaborg, a fortification that was built to shield Helsinki in the event of war.