The number of MIRVed, MIRVed SLBMs, heavy (i.e. long-range) bombers and the total number of strategic launchers were limited. The treaty set an overall limit of about 2400 of all these weapons systems for each party. The SALT II Treaty was signed by the President on 18 June 1979. Jimmy Carter and Brezhnev signed in Vienna and submitted shortly thereafter for ratification by the US Senate. But new tensions between the superpowers led Carter to withdraw the treaty from Senate scrutiny in January 1980, after the Soviet invasion of Afghanistan. The United States and the Soviet Union, however, voluntarily complied in subsequent years with the arms limits agreed under SALT II. Meanwhile, the new negotiations that were opened in Geneva in 1982 between the two superpowers took the name of Strategic Arms Reduction Talks (START). Strategic Arms Limitation Talks (SALT), negotiations between the United States and the Soviet Union to limit the production of strategic missiles capable of carrying nuclear weapons. The first agreements, known as SALT I and SALT II, were signed in 1972 and 1979 respectively by the United States and the Union of Soviet Socialist Republics and were intended to stem the arms race in strategic ballistic missiles (long-range or intercontinental) armed with nuclear weapons. First proposed in 1967 by US President Lyndon B.
Johnson, the two superpowers agreed in the summer of 1968 to discussions on strategic arms control and extensive negotiations began in November 1969.