What was the Intermediate-Range Nuclear Forces Treaty (1987-2019)?


The Intermediate-Range Nuclear Forces Treaty (INF Treaty, formally Treaty Between the United States of America and the Union of Soviet Socialist Republics on the Elimination of Their Intermediate-Range and Shorter-Range Missiles; Russian: Договор о ликвидации ракет средней и меньшей дальности / ДРСМД, Dogovor o likvidatsiy raket sredney i menshey dalnosti / DRSMD) was an arms control treaty between the United States and the Soviet Union (and its successor state, the Russian Federation). US President Ronald Reagan and Soviet General Secretary Mikhail Gorbachev signed the treaty on 08 December 1987 The US Senate approved the treaty on 27 May 1988, and Reagan and Gorbachev ratified it on 01 June 1988.

Mikhail Gorbachev and Ronald Reagan sign the INF Treaty.

The INF Treaty banned all of the two nations’ land-based ballistic missiles, cruise missiles, and missile launchers with ranges of 500-1,000 kilometres (310-620 miles) (short medium-range) and 1,000-5,500 km (620-3,420 miles) (intermediate-range). The treaty did not apply to air- or sea-launched missiles. By May 1991, the nations had eliminated 2,692 missiles, followed by 10 years of on-site verification inspections.

Amidst continuing growth of China’s missile forces, US President Donald Trump announced on 20 October 2018 that he was withdrawing the US from the treaty due to supposed Russian non-compliance. The United States claimed another reason for the withdrawal was to counter a Chinese arms buildup in the Pacific, including within the South China Sea, as China was not a signatory to the treaty. The US formally suspended the treaty on 01 February 2019, and Russia did so on the following day in response. The US formally withdrew from the treaty on 02 August 2019.


In March 1976, the Soviet Union first deployed the RSD-10 Pioneer (called SS-20 Saber in the West) in its European territories, a mobile, concealable intermediate-range ballistic missile (IRBM) with a multiple independently targetable re-entry vehicle (MIRV) containing three nuclear 150-kiloton warheads. The SS-20’s range of 4,700-5,000 kilometres (2,900-3,100 miles) was great enough to reach Western Europe from well within Soviet territory; the range was just below the Strategic Arms Limitation Talks II (SALT II) Treaty minimum range for an intercontinental ballistic missile (ICBM), 5,500 km (3,400 miles). The SS-20 replaced aging Soviet systems of the SS-4 Sandal and SS-5 Skean, which were seen to pose a limited threat to Western Europe due to their poor accuracy, limited payload (one warhead), lengthy time to prepare to launch, difficulty of concealment, and a lack of mobility which exposed them to pre-emptive NATO strikes ahead of a planned attack. While the SS-4 and SS-5 were seen as defensive weapons, the SS-20 was seen as a potential offensive system.

The US, then under President Jimmy Carter, initially considered its strategic nuclear weapons and nuclear-capable aircraft to be adequate counters to the SS-20 and a sufficient deterrent against possible Soviet aggression. In 1977, however, Chancellor Helmut Schmidt of West Germany argued in a speech that a Western response to the SS-20 deployment should be explored, a call which was echoed by NATO, given a perceived Western disadvantage in European nuclear forces. Leslie H. Gelb, the US Assistant Secretary of State, later recounted that Schmidt’s speech pressured the US into developing a response.

On 12 December 1979, following European pressure for a response to the SS-20, Western foreign and defense ministers meeting in Brussels made the NATO Double-Track Decision. The ministers argued that the Warsaw Pact had “developed a large and growing capability in nuclear systems that directly threaten Western Europe”: “theatre” nuclear systems (i.e. tactical nuclear weapons). In describing this “aggravated” situation, the ministers made direct reference to the SS-20 featuring “significant improvements over previous systems in providing greater accuracy, more mobility, and greater range, as well as having multiple warheads”. The ministers also attributed the altered situation to the deployment of the Soviet Tupolev Tu-22M strategic bomber, which they believed had “much greater performance” than its predecessors. Furthermore, the ministers expressed concern that the Soviet Union had gained an advantage over NATO in “Long-Range Theatre Nuclear Forces” (LRTNF), and also significantly increased short-range theatre nuclear capacity.

The Double-Track Decision involved two policy “tracks”. Initially, of the 7,400 theatre nuclear warheads, 1,000 would be removed from Europe and the US would pursue bilateral negotiations with the Soviet Union intended to limit theatre nuclear forces. Should these negotiations fail, NATO would modernize its own LRTNF, or intermediate-range nuclear forces (INF), by replacing US Pershing 1a missiles with 108 Pershing II launchers in West Germany and deploying 464 BGM-109G Ground Launched Cruise Missiles (GLCMs) to Belgium, Italy, the Netherlands, and the United Kingdom beginning in December 1983.


Early Negotiations (1981 to 1983)

The Soviet Union and United States agreed to open negotiations and preliminary discussions, named the Preliminary Intermediate-Range Nuclear Forces Talks, which began in Geneva, Switzerland, in October 1980. On 20 January 1981, Ronald Reagan was sworn into office after defeating Jimmy Carter in the 1980 United States presidential election. Formal talks began on 30 November 1981, with the US negotiators led by Reagan and those of the Soviet Union by General Secretary, Leonid Brezhnev. The core of the US negotiating position reflected the principles put forth under Carter: any limits placed on US INF capabilities, both in terms of “ceilings” and “rights”, must be reciprocated with limits on Soviet systems. Additionally, the US insisted that a sufficient verification regime be in place.

Paul Nitze, an experienced politician and long-time presidential advisor on defence policy who had participated in the SALT talks, led the US delegation after being recruited by Secretary of State Alexander Haig. Though Nitze had backed the first SALT treaty, he opposed SALT II and had resigned from the US delegation during its negotiation. Nitze was also then a member of the Committee on the Present Danger, a firmly anti-Soviet group composed of neoconservatives and conservative Republicans. Yuli Kvitsinsky, the well-respected second-ranking official at the Soviet embassy in West Germany, headed the Soviet delegation.

On 18 November 1981, shortly before the beginning of formal talks, Reagan made the Zero Option or “zero-zero” proposal. It called for a hold on US deployment of GLCM and Pershing II systems, reciprocated by Soviet elimination of its SS-4, SS-5, and SS-20 missiles. There appeared to be little chance of the Zero Option being adopted, but the gesture was well received by the European public. In February 1982, US negotiators put forth a draft treaty containing the Zero Option and a global prohibition on intermediate- and short-range missiles, with compliance ensured via a stringent, though unspecified, verification program.

Opinion within the Reagan administration on the Zero Option was mixed. Richard Perle, then the Assistant Secretary of Defense for Global Strategic Affairs, was the architect of the plan. Secretary of Defence Caspar Weinberger, who supported a continued US nuclear presence in Europe, was sceptical of the plan, though eventually accepted it for its value in putting the Soviet Union “on the defensive in the European propaganda war”. Reagan later recounted that the “zero option sprang out of the realities of nuclear politics in Western Europe”. The Soviet Union rejected the plan shortly after the US tabled it in February 1982, arguing that both the US and Soviet Union should be able to retain intermediate-range missiles in Europe. Specifically, Soviet negotiators proposed that the number of INF missiles and aircraft deployed in Europe by each side be capped at 600 by 1985 and 300 by 1990. Concerned that this proposal would force the US to withdraw aircraft from Europe and not deploy INF missiles, given US cooperation with existing British and French deployments, the US proposed “equal rights and limits” – the US would be permitted to match Soviet SS-20 deployments.

Between 1981 and 1983, US and Soviet negotiators gathered for six rounds of talks, each two months in length – a system based on the earlier SALT talks. The US delegation was composed of Nitze, Major General William F. Burns of the Joint Chiefs of Staff (JCS), Thomas Graham of the Arms Control and Disarmament Agency (ACDA), and officials from the US Department of State, Office of the Secretary of Defence, and US National Security Council. Colonel Norman Clyne, a SALT talks participant, served as Nitze’s chief of staff.

There was little convergence between the two sides over these two years. A US effort to separate the question of nuclear-capable aircraft from that of intermediate-range missiles successfully focused attention on the latter, but little clear progress on the subject was made. In the summer of 1982, Nitze and Kvitsinsky took a “walk in the woods” in the Jura Mountains, away from formal negotiations in Geneva, in an independent attempt to bypass bureaucratic procedures and break the negotiating deadlock. Nitze later said that his and Kvitsinsky’s goal was to agree to certain concessions that would allow for a summit meeting between Brezhnev and Reagan later in 1982.

Nitze’s offer to Kvitsinsky was that the US would forego deployment of the Pershing II but limit the deployment of GLCMs to 75. The Soviet Union, in return, would also have to limit itself to 75 intermediate-range missile launchers in Europe and 90 in Asia. Due to each GLCM launcher containing four GLCMs and each SS-20 launcher containing three warheads, such an agreement would have resulted in the US having 75 more intermediate-range warheads in Europe than the Soviet Union, though SS-20s were seen as more advanced and manoeuvrable than GLCMs. While Kvitsinsky was sceptical that the plan would be well received in Moscow, Nitze was optimistic about its chances in Washington. The deal ultimately found little traction in either capital. In the US, the Office of the Secretary of Defence opposed Nitze’s proposal, as it opposed any proposal that would allow the Soviet Union to deploy missiles to Europe while blocking US deployments. Nitze’s proposal was relayed by Kvitsinsky to Moscow, where it was also rejected. The plan accordingly was never introduced into formal negotiations.

Thomas Graham, a US negotiator, later recalled that Nitze’s “walk in the woods” proposal was primarily of Nitze’s own design and known beforehand only to Burns and Eugene V. Rostow, the director of ACDA. In a National Security Council meeting following the Nitze-Kvitsinsky walk, the proposal was received positively by the JCS and Reagan. Following protests by Perle, working within the Office of the Secretary of Defence, Reagan informed Nitze that he would not back the plan. The State Department, then led by Haig, also indicated that it would not support Nitze’s plan and preferred a return to the Zero Option proposal. Nitze argued that one positive consequence of the walk in the woods was that the European public, which had doubted US interest in arms control, became convinced that the US was participating in the INF negotiations in good faith.

In early 1983, US negotiators indicated that they would support a plan beyond the Zero Option if the plan established equal rights and limits for the US and Soviet Union, with such limits valid worldwide, and excluded British and French missile systems (as well as those of any other third party). As a temporary measure, the US negotiators also proposed a cap of 450 deployed INF warheads around the world for both the US and Soviet Union. In response, Soviet negotiators proposed that a plan would have to block all US INF deployments in Europe, cover both missiles and aircraft, include third parties, and focus primarily on Europe for it to gain Soviet backing. In the fall of 1983, just ahead of the scheduled deployment of US Pershing IIs and GLCMs, the US lowered its proposed limit on global INF deployments to 420 missiles, while the Soviet Union proposed “equal reductions”: if the US cancelled the planned deployment of Pershing II and GLCM systems, the Soviet Union would reduce its own INF deployment by 572 warheads. In November 1983, after the first Pershing IIs arrived in West Germany, the Soviet Union walked out of negotiations, as it had warned it would do should the US missile deployments occur.

Restarted Negotiations (1985 to 1987)

British Prime Minister Margaret Thatcher played a key role in brokering the negotiations between Reagan and new Soviet General Secretary Mikhail Gorbachev in 1986 to 1987.

In March 1986, negotiations between the US and the Soviet Union resumed, covering not only the INF issue, but also the separate Strategic Arms Reduction Treaty (START I) and space issues (Nuclear and Space Talks). In late 1985, both sides were moving towards limiting INF systems in Europe and Asia. On 15 January 1986, Gorbachev announced a Soviet proposal for a ban on all nuclear weapons by 2000, which included INF missiles in Europe. This was dismissed by the US and countered with a phased reduction of INF launchers in Europe and Asia with the target of none by 1989. There would be no constraints on British and French nuclear forces.

A series of meetings in August and September 1986 culminated in the Reykjavík Summit between Reagan and Gorbachev on 11 and 12 October 1986. Both agreed in principle to remove INF systems from Europe and to equal global limits of 100 INF missile warheads. Gorbachev also proposed deeper and more fundamental changes in the strategic relationship. More detailed negotiations extended throughout 1987, aided by the decision of West German Chancellor Helmut Kohl in August to unilaterally remove the joint US-West German Pershing 1a systems. Initially, Kohl had opposed the total elimination of the Pershing missiles, claiming that such a move would increase his nation’s vulnerability to an attack by Warsaw Pact Forces. The treaty text was finally agreed in September 1987. On 08 December 1987, the treaty was officially signed by Reagan and Gorbachev at a summit in Washington and ratified the following May in a 93–5 vote by the United States Senate.


The treaty prohibited both parties from possessing, producing, or flight-testing ground-launched ballistic and cruise missiles with ranges of 500-5,000 km (310-3,110 miles). Possessing or producing ground-based launchers of those missiles was also prohibited. The ban extended to weapons with both nuclear and conventional warheads, but did not cover air-delivered or sea-based missiles. Existing weapons had to be destroyed, and a protocol for mutual inspection was agreed upon. Each party had the right to withdraw from the treaty with six months’ notice, “if it decides that extraordinary events related to the subject matter of this Treaty have jeopardized its supreme interests”.



By the treaty’s deadline of 01 June 1991, a total of 2,692 of such weapons had been destroyed, 846 by the US and 1,846 by the Soviet Union. The following specific missiles, their launcher systems, and their transporter vehicles were destroyed:

  • United States:
    • BGM-109G Ground Launched Cruise Missile (decommissioned).
    • Pershing 1a (decommissioned).
    • Pershing II (decommissioned).
  • Soviet Union (listed by NATO reporting name):
    • SS-4 Sandal (decommissioned).
    • SS-5 Skean (decommissioned).
    • SS-12 Scaleboard (decommissioned).
    • SS-20 Saber (decommissioned).
    • SS-23 Spider (decommissioned).
    • SSC-X-4 Slingshot.

After the dissolution of the Soviet Union in December 1991, the United States considered twelve of the post-Soviet states to be inheritors of the treaty obligations (the three Baltic states are considered to pre-exist their annexation by the Soviet Union). Of the six having inspectable INF facilities on their territories, Belarus, Kazakhstan, the Russian Federation, and Ukraine became active participants in the treaty process, while Turkmenistan and Uzbekistan, having less significant INF sites, assumed a less active role.[44] As provided by the treaty, onsite inspections ended in 2001. After that time, compliance was checked primarily by satellites.

Initial Scepticism and Allegations of Treaty Violations

In February 2007, the Russian Federation President Vladimir Putin gave a speech at the Munich Security Conference in which he said the INF Treaty should be revisited to ensure security, as it only restricted Russia and the US but not other countries. The Chief of the General Staff of the Armed Forces of the Russian Federation, Army General Yuri Baluyevsky, contemporaneously said that Russia was planning to unilaterally withdraw from the treaty in response to deployment of the NATO missile defence system and because other countries were not bound to the treaty.

According to US officials, Russia violated the treaty in 2008 by testing the SSC-8 cruise missile, which has a range of 3,000 km (1,900 mile). Russia rejected the claim that their SSC-8 missiles violated the treaty, and claiming that the SSC-8 has a maximum range of only 480 km (300 miles). In 2013, it was reported that Russia had tested and planned to continue testing two missiles in ways that could violate the terms of the treaty: the road-mobile SS-25 and the newer RS-26 ICBMs. The US representatives briefed NATO on other Russian breaches of the INF Treaty in 2014 and 2017, and in 2018, NATO formally supported the US accusations and accused Russia of breaking the treaty. Russia denied the accusation and Putin said it was a pretext for the US to withdraw from the treaty. A BBC analysis of the meeting that culminated in the NATO statement said that “NATO allies here share Washington’s concerns and have backed the US position, thankful perhaps that it includes this short grace period during which Russia might change its mind.”

In 2011, Dan Blumenthal of the American Enterprise Institute wrote that the actual Russian problem with the INF Treaty was that China was not bound by it and continued to build up their own intermediate-range forces.

According to Russian officials and the American academic Theodore Postol, the US decision to deploy its missile defence system in Europe was a violation of the treaty as they claim they could be quickly retrofitted with offensive capabilities; this accusation has in turn been rejected by US and NATO officials and analyst Jeffrey Lewis. Russian experts also stated that the US usage of target missiles and unmanned aerial vehicles, such as the MQ-9 Reaper and MQ-4 Triton, violated the INF Treaty which has also in turn been rejected by US officials.

US Withdrawal and Termination

The US declared its intention to withdraw from the treaty on 20 October 2018. Donald Trump mentioned at a campaign rally that the reason for the pullout was because “they’ve [Russia has] been violating it for many years”.[9] This prompted Putin to state that Russia would not launch first in a nuclear conflict but would “annihilate” any adversary, essentially re-stating the policy of “Mutually Assured Destruction”. Putin claimed Russians killed in such a conflict “will go to heaven as martyrs”.

It was also reported that the US need to counter a Chinese arms buildup in the Pacific, including within South China Sea, was another reason for their move to withdraw, because China was not a signatory to the treaty. US officials extending back to the presidency of Barack Obama have noted this. For example, Kelly Magsamen, who helped craft the Pentagon’s Asian policy under the Obama administration, said China’s ability to work outside of the INF treaty had vexed policymakers in Washington, long before Trump came into office. A Politico article noted the different responses US officials gave to this issue: “either find ways to bring China into the treaty or develop new American weapons to counter it” or “negotiating a new treaty with that country”. The deployment since 2016 of the Chinese DF-26 IRBM with a range of 4,000 km (2,500 mi) meant that US forces as far as Guam can be threatened. The United States Secretary of Defence at the time, Jim Mattis, was quoted stating that “the Chinese are stockpiling missiles because they’re not bound by it at all”. Bringing an ascendant China into the treaty, or into a new comprehensive treaty including other nuclear powers, was further complicated by relationships between China, India and Pakistan.

The Chinese Foreign Ministry said a unilateral US withdrawal would have a negative impact and urged the US to “think thrice before acting”. On 23 October 2018, John R. Bolton, the US National Security Advisor, said on the Russian radio station Echo of Moscow that recent Chinese statements indicate that it wants Washington to stay in the treaty, while China itself is not bound by the treaty. On the same day, a report in Politico suggested that China was “the real target of the [pull out]”. It was estimated that 90% of China’s ground missile arsenal would be outlawed if China were a party to the treaty. Bolton said in an interview with Elena Chernenko from the Russian newspaper Kommersant on 22 October 2018: “we see China, Iran, North Korea all developing capabilities which would violate the treaty if they were parties to it. So the possibility that could have existed fifteen years ago to enlarge the treaty and make it universal today just simply was not practical.”

On 26 October 2018, Russia unsuccessfully called for a vote to get the United Nations General Assembly to consider calling on Washington and Moscow to preserve and strengthen the treaty. Russia had proposed a draft resolution in the 193-member General Assembly’s disarmament committee, but missed 18 October submission deadline so it instead called for a vote on whether the committee should be allowed to consider the draft. On the same day, Bolton said in an interview with Reuters that the INF Treaty was a Cold War relic and he wanted to hold strategic talks with Russia about Chinese missile capabilities.

Four days later at a news conference in Norway, NATO Secretary General Jens Stoltenberg called on Russia to comply with the treaty saying “The problem is the deployment of new Russian missiles”. Putin announced on 20 November 2018 that the Kremlin was prepared to discuss the INF Treaty with Washington but would “retaliate” if the United States withdrew.

Starting on 04 December 2018, the US asserted that Russia had 60 days to comply with the treaty. On 05 December 2018, Russia responded by revealing their Peresvet combat laser, stating the weapon system had been deployed with the Russian Armed Forces as early as 2017 “as part of the state procurement program”.

Russia presented the 9M729 (SSC-8) missile and its technical parameters to foreign military attachés at a military briefing on 23 January 2019, held in what it said was an exercise in transparency it hoped would persuade Washington to stay in the treaty. The Russian Defence Ministry said diplomats from the US, Britain, France and Germany had been invited to attend the static display of the missile, but they declined to attend. The US had previously rejected a Russian offer to do so because it said such an exercise would not allow it to verify the true range of the missile. A summit between US and Russia on 30 January 2019 failed to find a way to preserve the treaty.

The US suspended its compliance with the INF Treaty on 02 February 2019 following an announcement by US Secretary of State Mike Pompeo the day prior. In a statement, Trump said there was a six-month timeline for full withdrawal and INF Treaty termination if the Russian Federation did not come back into compliance within that period. The same day, Putin announced that Russia had also suspended the INF Treaty in a ‘mirror response’ to Trump’s decision to suspend the treaty, effective that day.[citation needed] The next day, Russia started work on new intermediate range (ballistic) hypersonic missiles along with land-based 3M-54 Kalibr systems (both nuclear armed) in response to the US announcing it would start to conduct research and development of weapons prohibited under the treaty.

Following the six-month US suspension of the INF Treaty, the Trump administration formally announced it had withdrawn from the treaty on 02 August 2019. On that day, Pompeo stated that “Russia is solely responsible for the treaty’s demise”. While formally ratifying a treaty requires the support of two-thirds of the members of the US Senate, because Congress has rarely acted to stop such actions a number of presidential decisions during the 20th and 21st centuries have established a precedent that the president and executive branch can unilaterally withdraw from a treaty without congressional approval. On the day of the withdrawal, the US Department of Defence announced plans to test a new type of missile that would have violated the treaty, from an eastern NATO base. Military leaders stated the need for this new missile to stay ahead of both Russia and China, in response to Russia’s continued violations of the treaty.

The US withdrawal was backed by several of its NATO allies, citing years of Russian non-compliance with the treaty. In response to the withdrawal, Russian Deputy Foreign Minister Sergei Ryabkov invited the US and NATO “to assess the possibility of declaring the same moratorium on deploying intermediate-range and shorter-range equipment as we have, the same moratorium Vladimir Putin declared, saying that Russia will refrain from deploying these systems when we acquire them unless the American equipment is deployed in certain regions.” This moratorium request was rejected by NATO’s Stoltenberg who said that it was not credible as Moscow had already deployed such warheads. On 05 August 2019, Putin stated, “As of August 2, 2019 the INF Treaty no longer exists. Our US colleagues sent it to the archives, making it a thing of the past.”

On 18 August 2019, the US conducted a test firing of a missile that would not have been allowed under the treaty. The Pentagon said that the data collected and lessons learned from this test would inform its future development of intermediate-range capabilities while the Russian foreign ministry said that it was a cause for regret, and accused the US of escalating military tensions.

Reactions to the Withdrawal

Numerous prominent nuclear arms control experts, including George Shultz, Richard Lugar and Sam Nunn, urged Trump to preserve the treaty. Gorbachev criticised Trump’s nuclear treaty withdrawal as “not the work of a great mind” and stated “a new arms race has been announced”. The decision was criticized by the chairmen of the United States House of Representatives Committees on Foreign Affairs and Armed Services who said that instead of crafting a plan to hold Russia accountable and pressure it into compliance, the Trump administration had offered Putin an easy way out of the treaty and played right into his hands. Similar arguments had been brought previously on 25 October 2018 by European members of NATO who urged the US “to try to bring Russia back into compliance with the treaty rather than quit it, seeking to avoid a split in the alliance that Moscow could exploit”.

NATO chief Stoltenberg suggested the INF Treaty could be expanded to include countries such as China and India, an idea that both the US and Russia had indicated being open to, although Russia had expressed scepticism that such an expansion could be achieved.

There were contrasting opinions on the withdrawal among American lawmakers. The INF Treaty Compliance Act (H.R. 1249) was introduced to stop the United States from using Government funds to develop missiles prohibited by the treaty, while Republican senators Jim Inhofe and Jim Risch issued statements of support for the withdrawal.

On 08 March 2019, the Foreign Ministry of Ukraine announced that since the US and Russia had both pulled out of the treaty, it now had the right to develop intermediate-range missiles, citing Russian aggression as a serious threat to the European continent, and the presence of Russian Iskander-M nuclear-capable missile systems in Russian-annexed Crimea. Ukraine was home to about forty percent of the Soviet space industry, but never developed a missile with the range to strike Moscow, only having both longer and shorter-ranged missiles, but has the capability to develop intermediate-range missiles. Ukrainian president Petro Poroshenko said “We need high-precision missiles and we are not going to repeat the mistakes of the 1994 Budapest Memorandum”, which had provided security assurances relating to the accession of Ukraine and other former Soviet states to the Treaty on the Non-Proliferation of Nuclear Weapons.

After the US withdrew from the treaty, some commentators wrote that it may allow the country to more effectively counter Russia and China’s missile forces.


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