The Four Power Agreement on Berlin, also known as the Berlin Agreement or the Quadripartite Agreement on Berlin, was agreed on 3 September 1971 by the reconvened Allied Control Council, consisting of ambassadors of the four wartime Allied powers. The four foreign ministers, Sir Alec Douglas-Home of the United Kingdom, Andrei Gromyko of the Soviet Union, Maurice Schumann of France, and William P. Rogers of the United States signed the agreement and put it into force at a meeting of the Council of Foreign Ministers in Berlin on 3 June 1972.[1] The agreement was not a treaty and required no formal ratification.