In 1937, the company is declared a "National Socialist model company", and a year later it is run as a defence industry enterprise. During World War II, prisoners of war from Poland, France and Italy are used for auxiliary work in the brewery; Ukrainian forced labourers produce "war-important" equipment for Telefunken AG in the underground cellars.
At the end of the war, the staff of Command Section H of " Festung Berlin" (Fortress Berlin) entrench themselves there; at times there are up to 1,000 soldiers on the site; even after the official capitulation, a few isolated NSDAP, SS and other soldiers defend the area. After the cessation of hostilities, the population clears out the brewery's food stores - pure existential need drives them on. The brewery and the buildings otherwise survive the world war largely undamaged.