On February 5, the New Strategic Arms Discount Treaty (New START) formally expired, marking the tip of the final remaining bilateral settlement constraining the nuclear arsenals of the U.S. and Russia. The New START treaty emerged from a interval of diplomatic reset between Washington and Moscow within the late 2000s. Its predecessor, START I, was signed in 1991 and expired in December 2009. Whereas the 2002 Moscow Treaty was nonetheless in impact, it lacked the rigorous verification and monitoring mechanisms usually of the START period.
Negotiations for a successor started in earnest in April 2009 after a gathering between then U.S. President Barack Obama and his Russian counterpart Dmitry Medvedev in London. The drafting course of concerned a number of rounds of talks in Geneva and Moscow. In April 2010, the 2 leaders signed the treaty in Prague and, after a contentious ratification course of within the U.S. Senate and approval by the Russian Federal Meeting, entered into power on February 5, 2011.
Nuclear limits
New START arrange verifiable limits on the strategic offensive arms of each nations and mandated that each events attain these limits inside seven years (by February 5, 2018) and preserve them thereafter. It capped the variety of deployed strategic warheads to 1,550 and imposed related limits on the numbers of heavy bombers, ICBMs, and SLBMs, allowed 18 on-site inspections a yr, prohibited every social gathering from interfering with the opposite’s Nationwide Technical Means (e.g. satellites), mandated knowledge alternate, and setup a bilateral fee to resolve points.
Nevertheless, all through its existence, New START confronted a number of hurdles that finally contributed to its demise. Maybe foremost: Russia typically argued that U.S. missile defence methods undermined the strategic stability, suggesting that if one aspect might neutralise the opposite’s retaliatory strike, the ‘mutually assured destruction’ dynamic could be damaged. Conversely, the U.S. expressed issues over typical immediate international strike capabilities, the place exact typical warheads are positioned on ballistic missiles — methods that New START counted beneath its nuclear limits.
Within the latter half of the treaty’s life, Russia additionally unveiled a number of novel strategic methods, together with the Sarmat heavy ICBM and the Avangard hypersonic glide automobile. Whereas the U.S. efficiently argued that these needs to be counted beneath New START, different methods just like the nuclear-powered underwater drone Poseidon and nuclear-powered cruise missile Burevestnik remained outdoors the treaty’s technical definitions, creating friction.
The treaty was initially set to run out in 2021. Simply days earlier than the deadline, the Biden administration and the Kremlin agreed to a one-time, five-year extension, transferring the expiration date to February 5, 2026. However in February 2023, after the battle in Ukraine escalated and undermined bilateral relations, President Vladimir Putin mentioned he was suspending Russia’s participation in New START as a result of, Moscow mentioned, the U.S. was looking for a “strategic defeat” of Russia and that western help to Ukraine made on-site inspections in Russia not possible. The U.S. quickly adopted by withholding its personal knowledge and notifications.
Negotiations for a successor treaty, typically referred to as Put up-New START, have been stalled all through 2024 and 2025. In late 2025, a Russian proposal for a voluntary one-year casual adherence to the 1,550 restrict was met with scepticism in Washington, the place the Trump administration signalled a desire for a “higher deal” as a substitute.
Logic of deterrence
Thus, right now, the authorized constraints on the world’s two largest nuclear arsenals have dissolved. For the primary time since 1972, there are not any legally binding limits on the variety of strategic nuclear weapons the U.S. and Russia can deploy. The formal channels to confirm the places and standing of nuclear forces have ceased to exist, forcing intelligence businesses to rely totally on satellite tv for pc imagery and different unilateral strategies. And sans the 1,550 cap, each nations possess the technical functionality to maneuver 1000’s of saved warheads to present missiles, an motion beforehand prohibited by the treaty.
Because of this, whereas the classical logic of deterrence, that every aspect refrains as a result of it expects a catastrophic response, nonetheless holds, the atmosphere wherein every authorities assesses the credibility of the opposite stands to vary. With out the New START infrastructure, either side will fall again to unilaterally gathering and decoding knowledge, which is extra error-prone and simpler to politicise.
This uncertainty additionally interacts with modern deterrence issues that weren’t there through the early Chilly Battle, when deterrence took form: the entanglement of nuclear and non-nuclear strategic methods and the premium either side place on non-contact choices like precision typical strikes and cyberattacks, which might threaten nuclear command and management with out crossing a nuclear threshold. That is why analysts akin to Karim Haggag of the Stockholm Worldwide Peace Analysis Institute have harassed the lack of predictability fairly than the looks of recent warheads alone.
You do it first
Second, the expiry of New START makes the prospect of together with China and different nuclear states in a bigger nonproliferation regime more durable in observe. Washington can now argue that it shouldn’t be the one state constrained whereas Beijing grows, and Moscow can argue that it shouldn’t settle for constraints whereas NATO’s combination capabilities form its safety atmosphere. Precisely these arguments have been the stumbling block for the Put up-New START talks.
It’s additionally more durable as a result of China’s public line has been that its arsenal isn’t comparable in measurement to these of the U.S. and Russia and that due to this fact it’s “not honest or cheap” to demand it enter their disarmament framework at this stage. With out an energetic U.S.-Russia treaty that demonstrates reciprocal restraint, China’s incentive to simply accept intrusive transparency measures can be weak. Beijing can plausibly argue that the 2 largest arsenals first have to reestablish verifiable limits and solely then can they ask others to tackle related obligations. The identical logic already complicates the involvement of different nuclear-armed states, together with India, Pakistan, Israel, and North Korea.
In 2025, Arms Management Affiliation board chairman Thomas Countryman argued that essentially the most practical near-term path is a regime with three prongs: the U.S. and Russia establishing measures to revive a primary degree of transparency, even informally at first; the P5 group standardising definitions and modest transparency practices; and establishing of nonproliferation instruments akin to hotlines, launch notifications, incident prevention, and fissile materials safety, to contain extra states with out instantly forcing them to rely one another’s warheads.
Actually the prevailing P5 course of is usually cited as one of some standing boards for this sort of incrementalism regardless that its output and momentum have been uneven in recent times.
Printed – February 05, 2026 11:37 am IST