As the Battle of Lahti was over on 1 May, the German troops and the Finnish Whites captured about 30,000 Reds in the surroundings of the town.

The men and those suspected as female fighters were transferred to the Hennala Garrison, where the prison camp was established.

As there was not enough space in Hennala, some of the captured Reds were moved to camps established in Helsinki, Hämeenlinna and Lappeenranta.

[citation needed] According to the diaries of the German officer Hans Tröbst, the women were shot with a machine gun in the nearby wood.

The present memorial was finally erected after the World War II in 1946, as the political situation in Finland had changed.

The third memorial is placed in the area of the Fellman camp, which today is a park in the western side of the Lahti city center.

Even the Finnish painter Henry Ericsson, who served in Hennala as a guard, has described the languished prisoners in his etchings.