What Happened
- New START (Strategic Arms Reduction Treaty), the last remaining nuclear arms control treaty between the United States and Russia, officially expired on February 5, 2026.
- The US State Department publicly stated that China has "massively expanded" its nuclear arsenal, with assessments indicating China now possesses approximately 600 operational warheads (up from 250 in 2015) and is on track to reach 1,000 by 2030.
- The US administration indicated interest in negotiating a replacement agreement that would include China — a trilateral nuclear deal rather than the bilateral US-Russia format of all past treaties.
- With New START's expiration, there are now no legally binding limits on the nuclear arsenals of the US and Russia for the first time since 1972.
- Washington stated that the lapse of New START presents the opportunity to strike a "better agreement" that captures all Russian warhead categories (not just deployed strategic warheads, as New START did) and includes China.
Static Topic Bridges
New START Treaty — Provisions and Significance
New START (New Strategic Arms Reduction Treaty) was signed by US President Barack Obama and Russian President Dmitry Medvedev in Prague on April 8, 2010, and entered into force on February 5, 2011. It was the successor to the Treaty of Moscow (SORT, 2002) and the original START I Treaty (1991).
New START capped each party's strategic nuclear forces at: 1,550 deployed nuclear warheads on ICBMs, SLBMs, and deployed heavy bombers; 700 deployed delivery vehicles; and 800 total deployed and non-deployed launchers. Crucially, it limited only "deployed strategic" warheads — not tactical nuclear weapons or non-deployed (stored) warheads. Both the US and Russia met these central limits by February 5, 2018.
Russia suspended its participation in New START in February 2023 (citing NATO weapons supplies to Ukraine), though it continued to observe the numerical limits. The treaty expired without renewal on February 5, 2026, ending over five decades of continuous US-Russia nuclear arms control.
- New START signed: April 8, 2010 (Prague); in force: February 5, 2011
- Duration: 10 years; extended by 5 years in 2021 (to February 5, 2026); now expired
- Central limits: 1,550 deployed strategic warheads; 700 deployed delivery vehicles; 800 total launchers
- Scope: strategic deployed warheads only — NOT tactical/theatre nuclear weapons, NOT stored warheads
- Russia's suspension: February 21, 2023 (citing NATO arms to Ukraine); did not withdraw from treaty
- Verification: on-site inspections + telemetry exchange (halted by Russia in 2022); now no verification mechanism
- Predecessor treaties: START I (1991, expired 2009), Moscow Treaty/SORT (2002, superseded by New START)
Connection to this news: The lapse of New START leaves no legal architecture constraining US or Russian nuclear arsenals — the first such unconstrained environment since 1972's SALT I. This is the backdrop against which the US is raising alarms about China's unconstrained expansion.
China's Nuclear Expansion — The Trilateral Challenge
China is a declared nuclear weapons state (since 1964 first test) and a permanent member of the UN Security Council. Unlike the US and Russia, China has never entered into formal bilateral nuclear arms control arrangements, citing the vast asymmetry in arsenal sizes. China's doctrine has traditionally been "minimum deterrence" — a small, survivable second-strike force. This doctrine appears to be changing.
The US DoD's annual China Military Power Report and other assessments document a dramatic acceleration in China's nuclear buildup: from approximately 250 warheads in 2015 to around 600 operational warheads in 2025, with projections of 1,000+ by 2030. China is expanding its nuclear triad (land-based ICBMs, submarine-launched ballistic missiles, and nuclear-capable bombers) and building new silo fields in Gansu, Inner Mongolia, and Xinjiang.
China has so far declined to participate in nuclear arms control talks, stating it will consider negotiations only when the US and Russia reduce their arsenals to China's level — a position that leaves no near-term path to trilateral arms control.
- China declared nuclear: 1964 (first test, Lop Nur site)
- China's nuclear doctrine: traditionally "No First Use" (NFU) + minimum deterrence; now under scrutiny
- Warhead estimates: ~250 (2015) → ~600 operational (2025) → projected ~1,000 (2030)
- Nuclear Triad components: DF-41 ICBMs (land), JL-3 SLBMs (Type 096 submarines), H-6N bombers (air)
- China's position on arms control: will engage only when US/Russia arsenal levels approach China's (a non-starter diplomatically)
- NPT status: China is one of the five recognised Nuclear Weapon States (NWS) under NPT Article IX
Connection to this news: The US alarm about China's buildup is linked directly to the New START lapse — with no treaty constraining US-Russia arsenals, and no agreement covering China, there is now no arms control architecture covering any of the three largest nuclear powers for the first time since the Cold War era.
Nuclear Non-Proliferation Treaty (NPT) — Framework and Limitations
The Treaty on the Non-Proliferation of Nuclear Weapons (NPT) is the foundational global nuclear governance framework. Signed in 1968, entered into force in 1970, extended indefinitely in 1995. It distinguishes between Nuclear Weapon States (NWS — US, Russia, China, UK, France) and Non-Nuclear Weapon States (NNWS), who agree not to acquire nuclear weapons in exchange for civilian nuclear cooperation and a commitment by NWS to pursue disarmament (Article VI).
India is notably NOT a signatory to the NPT — it conducted its first nuclear test in 1974 (Pokhran-I, "Smiling Buddha") and its second in 1998 (Pokhran-II, "Operation Shakti"). India operates outside the NPT framework but participates in some nuclear governance regimes (e.g., the Nuclear Suppliers Group — NSG waiver in 2008 via the India-US Civil Nuclear Agreement).
- NPT: opened for signature 1968; in force 1970; 191 state parties (most comprehensive arms control treaty)
- Five NWS under NPT: US, Russia, China, UK, France (the five permanent UNSC members)
- Non-signatories: India, Pakistan, Israel (undeclared), North Korea (withdrew 2003)
- Article VI of NPT: obligates NWS to "pursue negotiations in good faith on effective measures relating to cessation of the nuclear arms race and to nuclear disarmament" — frequently criticised as unfulfilled
- CTBT (Comprehensive Test Ban Treaty): adopted 1996; NOT in force — India, Pakistan, USA, China, Israel among non-ratifiers
- India's nuclear doctrine: "No First Use" (NFU) + "credible minimum deterrence"; NSAB (National Security Advisory Board) oversees doctrine
Connection to this news: The New START expiration and Chinese nuclear buildup highlight the limitations of the NPT framework — designed for a bipolar world — in managing a multi-polar nuclear environment. India, as a responsible nuclear power outside the NPT, has a stake in global strategic stability and any new arms control architecture.
Key Facts & Data
- New START expired: February 5, 2026 (after 5-year extension from February 2021)
- New START warhead limit: 1,550 deployed strategic warheads per side
- US nuclear arsenal: ~3,700 total warheads (deployed + stored + retired); ~1,550 deployed strategic (under New START limits)
- Russia nuclear arsenal: ~4,300 total warheads; ~1,550 deployed strategic (under New START limits)
- China nuclear arsenal: ~600 operational warheads (2025 estimate); projected 1,000 by 2030
- China's growth: from 250 warheads (2015) to 600 (2025) — fastest expansion of any nuclear state
- NPT members: 191 state parties; India, Pakistan, Israel not signatories; North Korea withdrew 2003
- China's first nuclear test: October 16, 1964 (Lop Nur)
- India's nuclear tests: 1974 (Pokhran-I, Smiling Buddha) and 1998 (Pokhran-II, Operation Shakti)
- Last arms control treaty before SALT I: none — SALT I (1972) was the start of the continuous US-Russia arms control era now ended