He was imprisoned for a while in 1918 for having sided with the Reds during the Finnish Civil War .
He was the chairman of the SDP from 1903 to 1905 and party secretary from 1918 to 1926 .
chairman was imprisoned for a while in 1918 for having sided with the Reds during the Finnish Civil War .
He was the chairman of the SDP from 1903 to 1905 and party secretary from 1918 to 1926 .