Answer: United Kingdom, the United States, France and the Soviet Union
Notes: The United Kingdom, the United States, France and the Soviet Union were the four countries that occupied Germany, upon the defeat of Nazi Germany in World War II. Allied-occupied Germany was the state of Germany upon the defeat of Nazi Germany in World War II when the victorious Allies asserted joint authority and sovereignty over Germany as a whole, defined as all territories of the former German Reich west of the Oder–Neisse line, having declared the destruction of Nazi Germany at the death of Adolf Hitler. The four powers divided "Germany as a whole" into four occupation zones for administrative purposes under the United States, United Kingdom, France and the Soviet Union, respectively. This division was ratified at the Potsdam Conference (17 July to 2 August 1945). The four zones were as agreed in February 1945 by the United States, United Kingdom and the Soviet Union meeting at the Yalta Conference; setting aside an earlier division into three zones (excluding France) proposed by the London Protocol.
