 They were joined in 1921 by five-month-old Turn-Borussia Duisburg thereby becoming TuS.The earliest of Eintracht's predecessor sides, Duisburger TSV 1848 then gave rise to two separate clubs in 1923 with the gymnasts forming Duisburger TV 1848 and the footballers forming Duisburger TSV 1899.This football club played two seasons in the Gauliga Niederrhein, one of sixteen top-flight divisions formed in the 1933 re-organization of German football under the Third Reich, before being relegated.