Members included General Dwight Eisenhower for the US, Field Marshal Sir Bernard Montgomery for Britain, and Marshal Georgy Zhukov for the Soviet Union. The commission delimited German territory to its territory of 31 December 1937 minus territory handed over to Poland and the Soviet Union, divided Germany into four zones of occupation under American, British, French, and Soviet military administration and separately divided Berlin into four sectors. The Commission ceased to exist after the Potsdam Conference, and the ACC was nominally the highest power in Germany, while in reality, each occupied zone was ruled by the respective occupying power