On June 18, 1979, an agreement to limit strategic launchers was reached in Vienna, signed by Leonid Brezhnev and Carter at a ceremony in the Redouten Hall of the Imperial Hofburg.  Strategic Arms Limitation Talks (SALT), negotiations between the United States and the Soviet Union to limit the manufacture of strategic missiles capable of carrying nuclear weapons. The first agreements, known as SALT I and SALT II, were signed in 1972 and 1979 by the United States and the Union of Soviet Socialist Republics and aimed to limit the arms race of strategic (long-range or intercontinental) nuclear-armed ballistic missiles. For the first time proposed by U.S. President Lyndon B. Johnson in 1967, strategic arms limitation talks were agreed by the two superpowers in the summer of 1968, and in November 1969 comprehensive negotiations began. It was the first agreement between the United States and the USSR that limited and restricted their nuclear weapons systems. At the Vladivostok Summit in November 1974, Ford and Brezhnev agreed on the basic framework for a SALT II agreement. This was a ceiling of 2,400 for strategic nuclear delivery vehicles (ICBMs, SLBMs and heavy bombers) for each side; A limit of 1,320 for MIRV systems; banning new land-based ICBM launchers; And limits to the use of new types of strategic offensive weapons. Through diplomatic channels in Washington and Moscow, discussions with Soviet representatives within the ENDC and exchanges at the highest level of the two governments, the United States continued to insist on the Soviet obligation to discuss the strategic limits of armaments. But it was not until the following year that evidence of a Soviet reassessment of their position emerged.
On 1 July 1968, at the signing of the Non-Proliferation Treaty, President Johnson announced that an agreement had been reached with the Soviet Union to begin talks on limiting and reducing strategic nuclear weapons and ballistic missile defence systems. The date and location of the talks had not yet been announced when the Soviet Union began its invasion of Czechoslovakia on 20 August, an event that postponed the talks indefinitely. Two initial dissents were obstacles. Soviet officials tried to define as “strategic” any American or Soviet weapons system capable of reaching the territory of the other party – that is, negotiable in SALT. It would be a system based on the United States, mainly short- and medium-range bombers stationed on aircraft carriers or in Europe, but it would have excluded, for example, Soviet medium-range missiles directed towards Western Europe. The United States decided that salt-negotiated weapons included intercontinental systems. Its forward-facing armed forces were used to fight Soviet medium-range missiles and aircraft aimed at American allies. Accepting the Soviet approach would have had an impact on the alliance`s commitments.
The SALT-1 treaty described an agreement in three areas: Nixon was proud to have reached an agreement through his diplomatic capabilities that his predecessors failed to achieve. Nixon and Kissinger planned to link arms control to détente and other pressing issues through what Nixon called the “link.” David Tal argues that the Strategic Arms Limitation Talks (SALT) were two rounds of bilateral conferences and international agreements that involved the United States and the Soviet Union, the Cold War superpowers, on the issue of arms control.