The following season a third side, Arminia 1906 Berlin, joined the newly created club which started to slowly improve returning to the Oberliga Berlin-Brandenburg (I) in 1931.

Within a couple of years German football was re-organised under the Third Reich into sixteen top-flight divisions with Blau-Weiss joining the Gauliga Berlin-Brandenburg.

After World War II occupying Allied authorities ordered the dissolution of all organizations in the country, including sports and football associations.

Blau-Weiß re-joined the top tier Oberliga Berlin in 1950 where they played as a lower to mid-table side until finally being relegated in 1960.

Once again a lower to mid-table side the club's performance improved in the early 1970s leading to a Regionalliga title in 1973 and a failed participation in the promotion rounds for the top-flight Bundesliga.

A poor finish in 1978 led to the club's relegation and they spent the next handful of seasons bouncing between the third and fourth divisions.