The runner-up finish in Berlin in 1925 and participation in the Berlin Cup final in 1926 were the only notable later successes. From then on, clubs such as Hertha BSC and Tennis Borussia dominated Berlin football. After the Second World War, the club continued first as communal sports group SG Oberschöneweide, then from 1948 as SG Union Oberschöneweide.\n\nThe team even qualified for the 1949 German championship finals, but was not allowed to travel to Kiel for the match against HSV.
Almost the entire first team then moved to West Berlin and left Union. In East Germany, the club changed its name to BSG Motor Oberschöneweide and was incorporated as a works sports club into the VEB Transformatorenwerk Karl Liebknecht.\n\nUntil 1962 the club played mostly in the third tier of East German football. It was only in 1965/66 that promotion to the DDR-Oberliga came.