Позен-Западная Пруссия
The party was established on 23 February 1921 by Richard Kunze in order to compete with the German Socialist Party. Based in Berlin, by 1925 it had a membership of around 34,000; 3,000 in Berlin, 5,000 in Saxony, 2,400 in Middle Silesia, 2,300 in Posen-West Prussia and 5,000 in Danzig.