Category: History & Politics Key figures: Ronald Reagan (US President), Mikhail Gorbachev (Soviet General Secretary), Paul Nitze (US negotiator), Margaret Thatcher (UK Prime Minister, key broker)
The Intermediate-Range Nuclear Forces (INF) Treaty was a landmark arms-control agreement signed by US President Ronald Reagan and Soviet General Secretary Mikhail Gorbachev at the White House in Washington, D.C., on December 8, 1987. The treaty prohibited both the United States and the Soviet Union from possessing, producing, flight-testing, or deploying ground-launched ballistic and cruise missiles with ranges of 500 to 5,500 kilometers (310–3,420 miles), covering both nuclear and conventional warheads. It was the first arms-control accord to eliminate an entire class of nuclear weapons, and it included an unprecedented mutual on-site inspection regime.
The treaty emerged from years of tense negotiations rooted in the Soviet Union’s deployment of the SS-20 intermediate-range ballistic missile in Europe beginning in 1976. In response, NATO adopted its “Double-Track Decision” in December 1979, combining arms-control talks with a commitment to deploy US Pershing II missiles and ground-launched cruise missiles if negotiations failed. Formal talks began in Geneva in November 1981. Early rounds collapsed in 1983 after the first Pershing IIs arrived in West Germany, and negotiations did not resume until March 1985 following Gorbachev’s ascent to power. The Reykjavík Summit of October 1986 produced an in-principle agreement on INF limits, and British Prime Minister Margaret Thatcher played a key role in bridging the two sides. The final treaty text was agreed in September 1987 and signed three months later.
By the treaty’s June 1991 deadline, 2,692 missiles had been destroyed — 846 by the United States and 1,846 by the Soviet Union — including all Pershing IIs, BGM-109G cruise missiles, SS-4, SS-20, and SS-23 systems. The US Senate ratified the treaty 93–5 in May 1988. The treaty remained in force until the United States withdrew on August 2, 2019, citing Russian violations, and Russia announced it would no longer abide by the treaty in August 2025.
The INF Treaty was a transformative moment in Cold War history and in the history of arms control. By mandating the destruction — rather than merely the limitation — of an entire category of nuclear weapons, it set a new precedent for what superpower diplomacy could achieve. Its robust verification framework, including on-site inspections, also established norms that influenced subsequent disarmament agreements.
The treaty signaled a fundamental shift in US-Soviet relations and contributed directly to the broader détente that would accelerate the end of the Cold War. For Western Europe, the elimination of SS-20s substantially reduced the nuclear threat that had prompted mass protest movements throughout the early 1980s. More broadly, the INF Treaty demonstrated that adversaries with deeply antagonistic ideologies could reach binding, verifiable agreements that served both parties’ security interests — a lesson that resonated in subsequent nonproliferation efforts.