The US may be entering a period of significant nuclear reassessment as it confronts a growing mismatch between its predominantly strategic arsenal and adversaries increasingly prepared for limited nuclear use.
This month, Breaking Defense reported that the US Department of Defense (DoD) has initiated a review of the nation’s nuclear posture to expand tactical nuclear strike options for the White House.
Undersecretary of Defense for Policy Elbridge Colby confirmed the re-examination of nuclear employment guidance, citing the need for “rational nuclear options” in response to potential regional conflicts with China or Russia.
The policy review comes amid longstanding US DoD concerns over foreign developments in low-yield warheads, which risk leaving the US without proportional non-strategic responses.
US Strategic Command head Admiral Richard Correll explained that while declaratory policy remains unchanged, the military seeks “escalation maneuver” space across non-kinetic, conventional and limited nuclear domains. The review will remain classified.
At present, the US nuclear arsenal and modernization program remain heavily weighted toward strategic forces over tactical nuclear weapons. Strategic nuclear weapons are designed to destroy an adversary’s war-making capabilities, namely its military, economic, political and population centers of gravity.
Strategic nuclear weapons encompass intercontinental ballistic missiles (ICBMs), strategic bombers, and nuclear ballistic missile submarines (SSBNs), designed to hit targets deep in an adversary’s territory.
In contrast, tactical nuclear weapons are designed to destroy an adversary’s war-fighting capabilities. These weapons could be deployed against enemy bases and force concentrations to gain a battlefield advantage.
Such weapons may include those deployed from dual-capable fighter aircraft (DCA), heavy artillery, tactical ballistic missile systems and ship- or submarine-launched cruise missiles.
March 2026 data from the Bulletin of the Atomic Scientists show that the US nuclear arsenal remains overwhelmingly structured around long-range strategic weapons, which comprise roughly 94% of all actively deployed warheads.
According to the data, of the US’s 1,770 deployed warheads, approximately 1,670 are assigned to the strategic triad — comprising land-based ICBMs, submarine-launched ballistic missiles (SLBMs), and strategic bombers — while non-strategic weapons account for only 100 tactical gravity bombs stationed in Europe.
The Bulletin of the Atomic Scientists report points out that the US’s multi-billion-dollar modernization priorities heavily favor strategic program overhauls, including Sentinel ICBMs, Columbia-class SSBNs and B-21 Raider stealth bombers, leaving tactical nuclear weapons as a small, specialized component of overall US nuclear posture.
However, the US emphasis on strategic nuclear weapons potentially leaves it inflexible against adversaries prepared to wage limited nuclear war.
In scenarios where adversaries are willing to employ limited nuclear strikes, a heavily strategic-weighted posture risks forcing a difficult binary — refrain from a nuclear response or escalate toward a strategic-level exchange.
Tactical nuclear weapons offer a more scalable signaling option short of strategic exchange, but their frequent use of dual-capable delivery systems can blur the line between conventional and nuclear operations, raising the risk of inadvertent escalation.
While the US nuclear posture remains heavily weighted toward strategic forces, China’s nuclear buildup and Russia’s continued nuclear threats in the Ukraine war may force a rethink.
Although China maintains a “no first use” (NFU) nuclear policy, its rapid nuclear buildup has raised concerns. China has approximately 620 nuclear warheads and is expanding its strategic triad through hundreds of new solid-fuel ICBM silos, Type 094/096 SSBNs carrying longer-range JL-3 SLBMs and air-launched ballistic missiles (ALCMs) on H-6N bombers, according to July 2026 data from the Bulletin of the Atomic Scientists.
The report notes that while China maintains lower-yield, dual-capable theater systems like the DF-26 intermediate-range missile, its future trajectory emphasizes strategic survivability, high readiness and launch-on-warning capabilities to project global deterrence and offset potential strategic disadvantages, with projections indicating it will exceed 1,000 warheads by 2030.
The growth and diversification of China’s nuclear arsenal complicate confidence in how its “no first use” pledge would hold under intense crisis conditions, particularly if survivability concerns create use-it-or-lose-it pressures.
In a US-China conflict over Taiwan, China could use increasingly severe nuclear signals—from missile tests and demonstrative detonations to limited nuclear use—to deter intervention or stave off defeat.
Beyond a possible Taiwan contingency, Japan’s call for public discourse about the role of nuclear weapons and its nuclear latency may be pushing China to reconsider its NFU policy.
Defense Minister Shinjiro Koizumi broke with the longstanding taboo on the issue by saying that Japan could not avoid addressing the nuclear issue when it comes to national security.
In that connection, Japanese Prime Minister Sanae Takaichi has long advocated for a review of Japan’s “no entry” aspect of its nuclear policy, possibly alluding to a nuclear-sharing arrangement with the US.
Moreover, Japan has a significant plutonium stockpile that its Institute of Laser Engineering at Osaka University could potentially use for developing nuclear weapons.
The institute’s inertial confinement fusion reactors (ICF) – similar to those used in French and US nuclear weapons programs – allow the physics of these weapons to be studied under laboratory conditions, possibly giving the country “virtual” nuclear testing capability.
While Russia has remained a longstanding nuclear peer competitor to the US, the Ukraine war may have fundamentally changed the dynamics between the two nuclear powers.
In a May 2026 report, the Bulletin of the Atomic Scientists says that Russia is finalizing a multi-decade overhaul replacing Soviet-era strategic and non-strategic nuclear weapons.
According to the report, Russia’s strategic modernization involving Sarmat ICBMs and Borei-class SSBNs aims to maintain parity with the US but faces severe manufacturing delays.
For Russia’s tactical nuclear forces, the report mentions that Russia focuses on fielding versatile, dual-use systems such as the Oreshnik and Iskander ballistic missiles, along with the Kinzhal air-launched hypersonic weapon, and increasing forward deployments in Belarus.
The report notes that while Russia’s nuclear warhead stockpile grew to around 4,400, it will increasingly rely on its tactical nuclear weapons to deter NATO, since its conventional forces have been badly battered during the Ukraine war.
Similar to China in a potential conflict with the US over Taiwan, Russia may opt to use its tactical nuclear forces to stave off a catastrophic battlefield defeat.
Russia may have also employed the threat of nuclear ambiguity, especially with its dual-capable Oreshnik ballistic missile. Although the Oreshnik has been used as a conventional terror weapon against Ukrainian cities, the underlying message could be that the next attack may be nuclear.
These pressures may force a fundamental rethink of a US nuclear posture shaped largely by bipolar Cold War competition but now confronting an increasingly multipolar nuclear order.
The US DoD’s tactical nuclear review reflects that shift: the central challenge is no longer simply deterring massive strategic attack but managing escalation across a wider spectrum of limited nuclear scenarios.
The expiry of New START, China’s rise as a peer nuclear competitor, North Korea’s continued modernization and Iran’s nuclear ambitions are pushing deterrence beyond the bilateral frameworks of the Cold War.
New mechanisms for arms control, crisis management and proliferation restraint will be needed to keep that multipolar competition from sliding toward nuclear war.
