The three heads of state and government have ratified the agreement of the European Advisory Commission setting the limits of post-war zones of occupation for Germany: three zones of occupation, one for each of the three main allies. They also agreed to give France an area of occupation that was cut off from the areas of the United States and the United Kingdom, although De Gaulle later refused to accept that the French zone be defined by borders defined in his absence. De Gaulle therefore ordered the French forces to occupy Stuttgart in addition to the previously agreed areas, which included the French zone of occupation. He only withdrew when he threatened to suspend most of the U.S. economic supply.  Churchill, at Yalta, argued at the time that the French must necessarily be full members of the proposed Allied Control Council for Germany. Stalin opposed it until Roosevelt supported Churchill`s position, but Stalin insisted that the French would not be admitted to the Allied Reparation Commission, which was to be set up in Moscow, and yielded only to the Potsdam conference. Although Yugoslavia was not considered as important as Italy and Greece, Churchill had insisted in June 1944 that a coalition government merge the provisional government of federal democratic Yugoslavia in 1943, proclaimed by Field Marshal Josip Broz Tito in 1943, with the Yugoslav government in exile, led by King Peter II.  Churchill hoped that with Stalin`s help he could convince Tito to accept King Peter II, believing that maintaining the Karasoor-Evia house would ensure that Yugoslavia remained at least partially within the British sphere of influence after the war.
 However, unlike Greece and Italy, where British ships along the Suez Canal route had to pass, this was not the case for Yugoslavia, which led Churchill to give less importance to this nation. With regard to Greece, British policy, as contained in an internal document, “our long-term policy towards Greece is to keep it within the British sphere of influence and… A Russian-dominated Greece would not correspond to the British strategy in the eastern Mediterranean.  British policy knew that the main resilience force in Greece was the EAM (Ethnika Apeleftherotik-Metopotik-National De Libération), British policy was to support the EAM to bind German forces that might otherwise fight the British, while preventing the EAM from coming to power and ensuring that the Greek government, with its headquarters in Cairo, returned to Greece.  Given Churchill`s importance to Greece, he absolutely wanted an agreement with Stalin that Moscow would accept Greece as part of the British sphere of influence.  The Potsdam Agreement was the August 1945 agreement between three World War II allies, the United Kingdom, the United States and the Soviet Union.