(2) The four governments agree, given their obligations under the Charter of the United Nations, that there is no use of force or threat of violence in the region and that disputes are resolved only through peaceful means. Rush informed National Security Adviser Henry Kissinger of the progress of the four-power negotiations on Berlin and informed him that the “bureaucrats had been foiled” and that an agreement had been reached and that it “contains virtually everything we hoped to achieve below our maximum requirement.” After the agreement came into force, the Soviet Union used this vague formulation to ease West Berlin`s relations with the Federal Republic of Germany. However, the agreement has contributed significantly both to the reduction of tensions between East and West via Berlin and to the expansion of contacts between the two sides of Germany. It thus made an important contribution to the process that led to the reunification of Germany in 1990. The ideal solution – the reunification of Berlin – was not feasible. On the other hand, it was unacceptable for us to treat West Berlin as a political entity in its own right, deprived of its natural ties with the Federal Republic or of the security guarantee of the three Western powers. With the agreement of the Allies, the fundamental treaty (in force in June 1973) recognized two German states and both countries committed themselves to respecting the sovereignty of the other. The treaty provides for exchanges of diplomatic representations and trade, tourism, cultural and communication relations. In September 1973, the two German states joined the United Nations. The four-power agreement on Berlin, also known as the Berlin Agreement or the four-party agreement on Berlin, was concluded on 3 September 1971 by the four allied powers of the war, represented by their ambassadors. The four foreign ministers 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 in Berlin on 3 June 1972. The agreement was not a treaty and did not require formal ratification. On September 3, 1971, the parties made a breakthrough in the negotiations. This roundtable focused on preparatory work based on practical provisions that would improve conditions in West Berlin and eliminate irritable barriers. The four-power agreement on Berlin has set out: 1. The four governments will seek to promote the removal of tensions and the prevention of complications in this area. These treaties were part of a revolutionary series of international agreements, considered by some to form the division of Europe during the Cold War, while others saw this as the beginning of the process that led to the end of the Cold War. Mr. E. Sarotte wrote in 2001 that “… Despite all the fears, both sides have managed to make a lot of good deals through the dialogue of relaxation.  U.S. Ambassador Rush advised National Security Adviser Henry Kissinger that negotiations take “no more than two weeks off” in accordance with Foreign Affairs Minister Rogers` request.
By reaffirming the rights and responsibilities of the four powers for the future of Berlin and Germany as a whole (which the Soviets claim to have abolished in the wake of the Berlin crisis of 1959-1962), the agreement laid the groundwork for a series of East-West agreements that began the time usually known as détente. In addition, relations between the two sides of Berlin have been restored, travel and communication between the two parts of the city have been improved and the inhabitants of the western sectors have made many improvements. Concerned about the speed of negotiations, Minister Rogers Rush`s ambassador (and Henry Kissinger) announced that “no agreement on an ad referendum should be reached at this stage.” The document is an updated assessment of German reunification by the Austrian Foreign Ministry.