After the Polish defeat in 1939, the parts of Upper Silesia awarded to Poland after the First World War were reoccupied by Nazi Germany and added to the Gau Oberschlesien.

Because of the outbreak of World War II in 1939, the league was split into two regional groups, one of five and one of seven clubs and the season start was delayed until early December 1939.

For its last season, 1940–41, it returned to a single-division format, now with eleven clubs, some of them from the newly occupied regions formerly part of Poland.

The new Gauliga Oberschlesien compromised the pre-war area of Upper Silesia and the formerly Polish reoccupied parts of the region.

With the end of the Nazi era, the Gauligas ceased to exist and Silesia became part of the Soviet occupation zone.

In turn, the Soviets handed over the region to Poland as compensation for the territories they lost in their east.