"Flaßhofstrasse" was originally called "Eintrachtstrasse". Prostitution on the upper part of this street occurred prior to 1914. The street's reputation soon became known beyond the city. When the Ruhr uprising broke out in defence of the Kapp Putsch in March 1920, the Ruhr Red Army, whose goal was the establishment of a Dictatorship of the proletariat, put into service the so-called "Red Cross sisters" as medical personnel, who consisted exclusively of prostitutes who were recruited "especially from Oberhausen". Some of them, the "Karbol-Mäuschen" (carbolic mice), took part in the looting of Schloss Sythen on March 21, 1920, which was then in the possession of the Count Otto von Westerholt and Gysenberg (1875-1920). "Red Cross Sisters" of the Red Ruhr Army, who were found with a pistol were shot by the Freikorps Epp, who had been deployed against the Ruhr uprising.