Tactical nuclear weapons (TNWs), sometimes called non-strategic nuclear weapons (NSNWs), are nuclear munitions intended for use on or near a battlefield to achieve operational military effects. They are typically distinguished from strategic weapons by three loose criteria: lower explosive yield (often from a fraction of a kiloton up to roughly 50 kt, though some exceed this), shorter delivery range, and a doctrine of use against troop concentrations, armor, naval groups, airfields, or hardened bunkers rather than against an adversary's homeland infrastructure.
Delivery systems have historically included artillery shells, short-range ballistic missiles, gravity bombs, depth charges, atomic demolition munitions, and dual-capable aircraft. During the Cold War, NATO deployed thousands of TNWs in Western Europe, and the Warsaw Pact fielded a comparable arsenal, reflecting NATO's flexible response doctrine adopted in 1967.
There is no formal legal definition of a tactical nuclear weapon in any binding treaty. The 1987 Intermediate-Range Nuclear Forces (INF) Treaty eliminated U.S. and Soviet ground-launched missiles of 500–5,500 km range, removing a large class of theater systems, but it did not cover shorter-range or air- and sea-delivered weapons. The Presidential Nuclear Initiatives of 1991–1992, announced by George H.W. Bush and reciprocated by Mikhail Gorbachev and Boris Yeltsin, led to large unilateral reductions in tactical stockpiles, though these commitments are not verifiable and not legally binding. The New START treaty (2010) covers only deployed strategic warheads and delivery vehicles.
Russia is generally assessed to hold the largest tactical arsenal, estimated by open sources such as the Federation of American Scientists at roughly 1,000–2,000 warheads. The United States retains a smaller stockpile, including B61 gravity bombs forward-deployed in several NATO states under nuclear sharing arrangements. Concerns about TNWs intensified after 2022 amid Russian rhetoric during the war in Ukraine and the announced deployment of Russian tactical weapons to Belarus in 2023.
Example
In March 2023, President Vladimir Putin announced that Russia would station tactical nuclear weapons in Belarus, the first such deployment outside Russian territory since the Soviet collapse.
Frequently asked questions
The distinction is doctrinal rather than legal. Tactical weapons generally have lower yields, shorter ranges, and target military forces in a theater of operations, while strategic weapons target an adversary's homeland, cities, and command infrastructure.
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