Tactical Nuclear Weapons

Tactical nuclear weapons are designed for use in a specific theater of operations, typically against military targets such as troop concentrations, armored formations, ships, or airfields, rather than against an adversary's cities or industrial base. They are generally characterized by lower yields (often less than 50 kilotons, though some can be higher) and shorter delivery ranges, often under 500 kilometers. Delivery systems include artillery shells, short-range ballistic missiles, cruise missiles, gravity bombs, and depth charges. The U.S. and Russia have historically deployed thousands of such weapons, but their numbers have been reduced since the Cold War. The distinction between tactical and strategic is not always clear: some weapons, like the B61 bomb, can be used in both roles, and the range of delivery systems can overlap. The Federation of American Scientists notes that the definition is often based on the target and the intent rather than the weapon itself.¹

The concept of tactical nuclear weapons emerged in the early 1950s as the U.S. sought to counter Soviet conventional superiority in Europe. The development of compact warheads allowed for artillery shells (e.g., the M65 Atomic Cannon) and short-range missiles like the Honest John. By the 1960s, the U.S. had deployed thousands of tactical nuclear weapons in Europe under NATO's nuclear-sharing arrangements. The Soviet Union developed its own arsenal, including the FROG and Scud missiles. These weapons were integrated into war plans, with the idea of using them to halt a Soviet invasion without escalating to a full strategic exchange. The 1987 Intermediate-Range Nuclear Forces (INF) Treaty eliminated an entire class of ground-launched missiles, but sea- and air-launched tactical weapons remained. The end of the Cold War led to unilateral reductions, but both Russia and the U.S. still retain significant stockpiles.

As of 2023, the U.S. maintains an estimated 1,000 non-strategic nuclear warheads, primarily the B61 bomb (with the B61-12 life-extension program) and the W76-2 low-yield warhead for submarine-launched ballistic missiles. Russia is estimated to have 1,000–2,000 non-strategic warheads, including systems like the Iskander-M short-range ballistic missile and the Kalibr cruise missile. Both countries are modernizing their tactical nuclear forces, raising concerns about lowered use thresholds. China, Pakistan, and India are also developing or fielding tactical nuclear weapons, with China's H-6 bomber and possibly the DF-17 hypersonic glide vehicle. The 2022 Russian invasion of Ukraine has heightened attention on Russia's tactical nuclear arsenal, with President Putin making veiled threats. Arms control agreements like New START do not cover tactical nuclear weapons, leaving them unconstrained.²

Tactical nuclear weapons have been a persistent challenge for arms control due to their small size, mobility, and the difficulty of verification. The 1991 Presidential Nuclear Initiatives were unilateral U.S. and Soviet/Russian commitments to withdraw and eliminate many tactical weapons, but they were not legally binding. Efforts to negotiate a treaty specifically on tactical nuclear weapons have stalled, partly because Russia has refused to discuss them until the U.S. removes its B61 bombs from Europe. The 2010 Nuclear Posture Review and subsequent policy documents have emphasized the role of non-strategic weapons in deterrence, while critics argue that their use would blur the nuclear threshold and increase the risk of escalation. The 2022 Nuclear Posture Review maintained the U.S. commitment to extended deterrence, but also highlighted the need for dialogue with Russia on risk reduction.³

One lesser-known aspect is the development of nuclear artillery shells, such as the W33 and W48, which were deployed in Europe and later retired. Another is the concept of nuclear landmines, like the U.S. Special Atomic Demolition Munition (SADM), which were portable devices intended to be placed by special forces and detonated remotely. The Soviet Union also developed nuclear torpedoes, such as the T-5, and nuclear depth charges for anti-submarine warfare. The 1958 Hardtack II test series included low-yield tests for tactical weapons, some with yields under 1 kiloton. The B61-12, a modernized tactical bomb, is notable for its precision guidance, which allows for lower yield and reduced collateral damage. The U.S. also developed the W54 warhead for the Davy Crockett recoilless rifle, a man-portable nuclear weapon with a yield of only 10–20 tons of TNT, which was deployed in the 1960s but later withdrawn due to safety and effectiveness concerns.⁴

Yield

The explosive energy of a nuclear weapon, usually expressed in kilotons (kt) or megatons (Mt) of TNT equivalent.

Non-strategic nuclear weapons

Another term for tactical nuclear weapons, used in official documents.

Nuclear-sharing

NATO arrangement where non-nuclear member states host and deliver U.S. nuclear weapons under dual-key control.

Low-yield warhead

A warhead with a yield of less than 20 kilotons, often used on tactical weapons.