The Allied Control Council or Allied Control Authority, known in the German language as the Alliierter Kontrollrat and also referred to as the Four Powers (German: Vier Mächte), was a military occupation governing body of the Allied Occupation Zones in Germany and Austria after the end of World War II in Europe. The members were the Soviet Union, the United States, and the United Kingdom; France was later added with a vote, but had no duties. The organization was based in Berlin-Schöneberg. The Council was convened to determine several plans for post-War Europe, including how to change borders and transfer populations in Eastern Europe and Germany.
Allied preparations for the postwar occupation of Germany began during the second half of 1944, after Allied forces began entering Germany in September 1944. Most of the planning was carried out by the European Advisory Commission (EAC) established in early 1944. Already on 3 January 1944, the Working Security Committee in the EAC concluded that
It is recognized that, in view of the chaotic conditions to be anticipated in Germany, whether a capitulation occurs before invasion or after invasion and consequent establishment of military government, an initial period of military government in Germany is inevitable and should be provided for.
The EAC also recommended the creation of a tripartite US, Soviet and British agency to conduct German affairs following the surrender of the Third Reich. The British representative at the EAC, Sir William Strang, was undecided on whether a partial occupation of Germany by Allied troops was the most desirable course of action. At the first EAC meeting on January 14, 1944, Strang proposed alternatives that favored the total occupation of Germany, similar to the situation following the First World War when Allied rule was established over the Rhineland. Strang believed that a full occupation would limit the reliance on former Nazis to maintain order within Germany. He also believed that it would make the lessons of defeat more visible to the German population and would enable the Allied governments to carry out punitive policies in Germany, such as transferring territories to Poland. The main arguments against total occupation were that it would create an untold burden on Allied economies and prolong the suffering of the German population, possibly driving new revanchist ideologies. However, his final conclusion was that a total occupation would be most beneficial, at least during the initial phase. In August 1944, the US government established the United States Group to the Control Council for Germany, which served as a liaison group within the EAC for planning the future occupation of Germany. The chairman of this group was Brig. Gen. Cornelius Wendell Wickersham.