SC Union Oberschöneweide – one of the preceding clubs of 1. FC Union Berlin, founded in 1966 – won the Berlin Championship on May 13, 1920 with a 2-1 win over Union 1892.

Such political unrest forced a number of matches to be abandoned in the VBB-Verbandsliga. A routine conclusion to the Berlin Championship could not be guaranteed. Union Oberschöneweide were league leaders at this point and would compete overall for Germany's League Championship – then decided on a play-off basis involving champions of each region. The results confirmed Union Oberschöneweide would be awarded the trophy, the first in the club's history.

Goalscorer Willi Jachmann fired Union Oberschöneweide to the win over Union 1892 in front of 2,500 spectators in the capital. 

Union Oberschöneweide's campaign in the play-offs came to a quick end after losing 3-2 to Vereinigte Sportfreunden Breslau in the first round of the nationwide competition.