The Strategic Arms Reduction Treaty (START I), first proposed in the early 1980s by President Ronald Reagan and finally signed in July 1991, forced the United States and the Soviet Union to reduce their strategic arsenals to 1,600 delivery vehicles, which carried no more than 6,000 warheads in accordance with the rules of the agreement. The agreement required the destruction of surplus delivery vehicles, which were verified through an intrusive control system including on-site inspections, regular exchanges of information (including telemetry) and the use of national technical means (e.g. satellites). The entry into force of the agreement was delayed for several years due to the collapse of the Soviet Union and subsequent efforts to de-incarcerate Ukraine, Kazakhstan and Belarus, returning their nuclear weapons to Russia and making it part of the non-proliferation and launch I agreements. Start I reductions were completed in December 2001 and the contract expired on December 5, 2009. START II In reality, the agreement had little impact, with Henry Kissinger concerned about whether it was worth it and described the result as “useful marginal”.  The United States and the Soviet Union agree on the principle that an agreement must be reached to limit the fear and threat of nuclear war. With the Basic Agreement in Principle and Strategic Limitation Speeches (SALT), it was an attempt to establish “rules” for the superpower during the Cold War. The bilateral agreement, which has multilateral implications, describes the general behaviour of both countries and towards third world countries. The contracting parties agreed that, in a situation that threatened to escalate into a direct nuclear confrontation, either directly or through the taking of substitutes in the Third World, urgent consultation should be made.
Contrary to the original Soviet proposal, which Kissinger considered totally unacceptable, the agreed text offered the United States “marginally useful” shelters, not specifically in the area of the prevention of nuclear war, but in the field of Kissinger`s geopolitical realpolitik: according to him, “it would be impossible for the Soviets to intervene either against NATO or in the Middle East without violating the agreement. And that gave us some kind of legal framework to resist a Soviet attack on China.  Nevertheless, Kissinger doubted that the agreement “is worth it.”  In November 1969, thus in May 1972, the Strategic Arms Limitation Talks (SALT) produced both the Ballistic Missile Treaty (ABM), which limited strategic missile defence to 200 (more than 100) interceptors, and the interim agreement, an executive agreement, US and Soviet intercontinental missiles (ICBM) and submarine-launched ballistic missiles (SLBM). As part of the interim agreement, both parties committed not to build new ICBM silos, not to “significantly” increase the size of existing ICBMs, and to limit the number of SLBM starter tubes and SLBM-carrying submarines. The agreement ignored strategic bombers and did not address warhead numbers, so both sides were free to increase their armed forces by placing several warheads (MIRVs) on their ICBMs and SLBMs and strengthening their bomber forces. The agreement limited the United States to 1,054 ICBM silos and 656 SLBM starter tubes. The Soviet Union was limited to 1,607 ICBM silos and 740 SLBM starter tubes.