 Arrangements would, however, be confirmed at the Potsdam Conference in July/August 1945.Berlin itself was to be separately treated, surrounded by the Soviet occupation zone and itself administered as four separate military zones (or "sectors").On 2 May 1945 - a few days before the formal end of the war - the local Soviet commander appointed Karl-Heinz Gerstner to serve as "second deputy mayor" in Berlin-Wilmersdorf.