After World War II, occupying Allied authorities banned most organisations in Germany, including sports and football clubs. "Hertha" restarted at the end of 1945 as "SG Gesundbrunnen" (named after a district of northern Berlin) and resumed play in the Oberliga Berlin - Gruppe C. The thirty-six teams of the first season of the postwar Oberliga Berlin were reduced to just 12 the next year and the club found itself out of first division football and playing in the Amateurliga Berlin. By the end of 1949, they had become "Hertha BSC Berlin" again.