In the summer of 2019, the Administration of US President Donald Trump decided to quit the Intermediate-Range Nuclear Forces (INF) Treaty. Since 2014, the United States had been publicly accusing Moscow of violating the Treaty by flight-testing a ground-launched cruise missile (GLCM) in the ranges banned by the INF Treaty (500–5,500 km). Subsequently, US officials expressed concerns that Russia might have started to produce more missiles than needed to sustain a flight-test program. Russia rejected the accusations and tabled a number of counter-allegations against the United States. The diplomatic back-and-forth finally culminated in the US’ decision to withdraw from the Treaty—a decision with potentially wide-ranging repercussions for the security of Europe and East Asia.
Back in July 2018, NATO heads of state and governments had reaffirmed their intention to “remain fully committed to the preservation of this landmark arms control treaty.” Trump’s withdrawal announcement, therefore, came as a surprise to most US Allies. In the following weeks, US officials began to provide more details about the Russian violation. According to these public statements, Russia had tested a GLCM, the Novator 9M729 (NATO designation SSC-8, “Screwdriver”) from both fixed and mobile launchers, far surpassing a range beyond the INF compliance threshold. Even the German government, which had previously been hesitant to call out Russia publicly, shifted course. On 20 November 2018, German Chancellor Angela Merkel stated “[they] [knew]” that Russia had not been complying with the INF “for some time.” In December 2018, NATO Allies announced that they “strongly support the finding of the United States that Russia is in material breach of its obligations under the INF Treaty.” A last-ditch effort to find a diplomatic solution to the crisis, suggested by Chancellor Merkel, would only delay US withdrawal from the INF Treaty. On 1 February 2019, Donald Trump declared that the United States would exit the INF Treaty six months later. On 2 August 2019, INF became history.
 US Department of State, “Adherence to and Compliance with Arms Control, Nonproliferation, and Disarmament Agreements and Commitments,” April 2017, https://www.state.gov/2017-report-on-adherence-to-and-compliance-with-arms-control-nonproliferation-and-disarmament-agreements-and-commitments/
 Michael R. Gordon, “Russia Is Moving Ahead with Missile Program That Violates Treaty, U.S. Officials Say, New York Times, 19 October 2016, http://www.nytimes.com/2016/10/20/world/europe/russia-missiles-inf-treaty.html?_r=0
 The Ministry of Foreign Affairs of the Russian Federation, “Comments on the Report of the U.S. Department of State on Adherence to and Compliance with Arms Control, Nonproliferation, and Disarmament Agreements and Commitments,” 1 August 2014, http://www.mid.ru/brp_4.nsf/0/D2D396AE143B098144257D2A0054C7FD
 “NATO Brussels Summit Declaration Issued by the Heads of State and Government participating in the meeting of the North Atlantic Council in Brussels,” 11-12 July 2018, www.nato.int/cps/en/natohq/official_texts_156624.htm
 Office of the Director of National Intelligence, “Director of National Intelligence Daniel Coats on Russia’s INF Treaty Violation,” 30 November 2018, www.dni.gov/index.php/newsroom/speeches-interviews/item/1923-director-of-national-intelligence-daniel-coats-on-russia-s-inf-treaty-violation
 Pressestatements von Bundeskanzlerin Merkel und dem dänischen Ministerpräsidenten Rasmussen [Press statement of Chancellor Merkel and Danish Prime Minister Rasmussen], 20 November 2018, www.bundeskanzlerin.de/bkin-de/aktuelles/pressestatements-von-bundeskanzlerin-merkel-und-dem-daenischen-ministerpraesidenten-rasmussen-1552136
 Statement on the Intermediate-Range Nuclear Forces (INF) Treaty Issued by the NATO Foreign Ministers, Brussels, 4 December 2018, https://www.nato.int/cps/en/natohq/official_texts_161122.htm