By the Berlin Declaration (German: Berliner Erklärung/Deklaration) of 5 June 1945,[n 1] the four governments of the United States, Soviet Union, United Kingdom and France, acting on behalf of the Allies of World War II, jointly assumed "supreme authority" over German territory and asserted the legitimacy of their joint determination of issues regarding its administration and boundaries, prior to the forthcoming Potsdam Conference.