Disarmament is the reduction or elimination of weapons, military equipment, or armed forces. It may concern a particular weapon category, national arsenals, or the weapons held by armed groups after a conflict. Measures range from negotiated reductions to comprehensive prohibitions requiring the destruction of existing stocks. Within the United Nations, disarmament forms part of efforts to maintain international security and reduce the resources devoted to armaments. (unidir.org)
Scope and related concepts
Disarmament overlaps with, but is distinct from, arms control and nuclear non-proliferation. Arms control regulates the quantity, characteristics, deployment, transfer, or use of weapons; it does not necessarily require their elimination. Non-proliferation seeks to prevent the spread of nuclear weapons and associated capabilities. Disarmament more specifically concerns reducing or removing existing armaments. A single agreement can serve several of these purposes. (unidir.org)
Disarmament can be partial or comprehensive, unilateral or negotiated, and bilateral, regional, or multilateral. The United Nations objective of general and complete disarmament under effective international control encompasses more than the abolition of a single weapon category: it places reductions of armaments within a wider framework of international security. The United Nations General Assembly endorsed this objective in 1959 and reaffirmed it at its first special session devoted to disarmament in 1978, giving nuclear disarmament the highest priority. (un.org)
Historical development
An important interwar initiative was the Washington Naval Conference of 1921–1922. Its Five-Power Treaty established limits on capital-ship tonnage for the United States, United Kingdom, Japan, France, and Italy. It illustrates how naval disarmament negotiations could combine reductions with agreed ceilings rather than seek the complete elimination of military fleets. (history.state.gov)
After World War II, disarmament became a central United Nations concern. Article 26 of the United Nations Charter assigned the Security Council responsibilities concerning a system for regulating armaments. On 24 January 1946, the General Assembly’s first resolution established an Atomic Energy Commission whose mandate included proposals for eliminating atomic weapons and other major weapons adaptable to mass destruction. (digitallibrary.un.org)
Subsequent diplomacy developed separate arrangements for nuclear, biological, chemical, and conventional weapons. These differed in their objectives: some restricted testing or acquisition, while others prohibited entire categories and required destruction. The resulting framework consists of multiple treaties rather than a single universal disarmament agreement. (un.org)
Nuclear disarmament
Nuclear weapons are addressed through instruments combining non-proliferation, reductions, prohibitions, and verification. The Treaty on the Non-Proliferation of Nuclear Weapons (NPT), opened for signature in 1968 and effective from 5 March 1970, combines restrictions on the spread of nuclear weapons with provisions for peaceful nuclear cooperation and disarmament negotiations. Article VI commits every party to pursue negotiations in good faith on ending the nuclear arms race, nuclear disarmament, and general and complete disarmament under international control. It does not prescribe a fixed timetable for eliminating nuclear arsenals. (legal.un.org)
The Treaty on the Prohibition of Nuclear Weapons, adopted on 7 July 2017, entered into force on 22 January 2021. It establishes a prohibition-based framework directed toward nuclear elimination. Its entry into force created obligations for its parties; it did not itself eliminate nuclear weapons worldwide. (treaties.un.org)
Chemical and biological disarmament
The Chemical Weapons Convention prohibits chemical weapons and requires the destruction of declared stocks and relevant production facilities. It entered into force on 29 April 1997 and is implemented by the Organisation for the Prohibition of Chemical Weapons (OPCW). On 7 July 2023, the OPCW confirmed the verified destruction of the last chemical weapon in the stockpiles declared by the convention’s parties. This finding concerned declared stockpiles, not proof that no chemical weapons existed anywhere; old and abandoned weapons and the prevention of re-emergence remained relevant tasks. (treaties.un.org)
The Biological Weapons Convention, concluded in 1972 and effective from 1975, prohibits biological and toxin weapons. Unlike the chemical convention, it did not establish an equivalent implementing organization with a comprehensive routine inspection system. Its parties have pursued measures to strengthen compliance and examine verification options. The United Nations Secretary-General’s mechanism for investigating alleged biological-weapons use is separate from the convention. (un.org)
Conventional and humanitarian disarmament
Disarmament also concerns conventional weapons. Some agreements prohibit particular weapons because of their humanitarian consequences rather than seek reductions across all conventional military capabilities. These instruments connect disarmament with international humanitarian law. (icrc.org)
The 1997 Anti-Personnel Mine Ban Convention prohibits the use, stockpiling, production, and transfer of anti-personnel mines and requires their destruction. The 2008 Convention on Cluster Munitions, effective from 1 August 2010, prohibits cluster munitions as defined by the treaty and includes obligations for stockpile destruction, clearance of contaminated areas, and victim assistance. These treaties combine weapons elimination with measures addressing hazards that persist after fighting ends. (icrc.org)
Disarmament after armed conflict
In peace processes, disarmament is often one component of disarmament, demobilization and reintegration (DDR). Disarmament removes weapons from members of armed groups; demobilization concerns their departure from those groups; reintegration supports their transition into civilian society. These are related but separate activities: collecting weapons does not by itself provide former combatants with civilian livelihoods or establish lasting security. (peacekeeping.un.org)
DDR programmes can therefore include education, employment opportunities, community initiatives, and other socioeconomic support alongside weapons collection. Their scope extends beyond the physical disposal of armaments to the relationships between former combatants, communities, and the peace process. (un.org)
Verification and implementation limits
Verification is the collection and assessment of information to determine whether agreed obligations are being fulfilled. Depending on the instrument, it can involve declarations, records, inspections, technical monitoring, and confirmation of destruction. Chemical-weapons destruction, for example, is subject to OPCW inspection and certification procedures. Nuclear disarmament presents additional challenges, including confirming that items submitted for dismantlement are authentic weapons without disclosing sensitive design information. (unidir.org)
A prohibition, a declaration, and verified destruction are different evidentiary stages. Verification of declared stocks does not automatically establish the absence of undeclared stocks, and dismantling existing weapons does not necessarily remove the knowledge or industrial capacity to produce them again. Accordingly, disarmament arrangements can combine destruction requirements with continuing monitoring and measures intended to prevent re-emergence. The chemical and biological regimes also demonstrate that treaties can differ substantially in their institutional and verification provisions. (opcw.org)
References
- Coming to Terms with Security: A Lexicon for Arms Control, Disarmament and Confidence-Buildingunidir.org
- General and complete disarmament: Introductiondigitallibrary.un.org
- International Day for the Total Elimination of Nuclear Weaponsun.org
- The Washington Naval Conference, 1921–1922history.state.gov
- What is nuclear disarmament?un.org
- Disarmamentun.org
- United Nations Treaty Collection: Chapter XXVI, Disarmamenttreaties.un.org
- Treaty on the Non-Proliferation of Nuclear Weapons — Main Pagelegal.un.org
- Treaty on the Non-Proliferation of Nuclear Weapons: Treaty Textun.org
- United Nations Treaty Collection: Treaty on the Prohibition of Nuclear Weaponstreaties.un.org
- United Nations Treaty Collection: Chemical Weapons Conventiontreaties.un.org
- OPCW confirms: All declared chemical weapons stockpiles verified as irreversibly destroyedopcw.org