Contents

SIPRI Yearbook 2020

Contents
Preface
Abbreviations and conventions
- Abbreviations and conventions
- Conventions
- Geographical regions and subregions
SIPRI Yearbook online
Introduction
1. Introduction: International stability and human security in 2019
- I. Flashpoints
- II. Arms control
- III. Climate change
- IV. The international system and law
Part I. Armed conflict and conflict management, 2019
2. Global developments in armed conflict, peace processes and peace operations
- Overview
- I. Tracking armed conflicts and peace processes
- II. Global and regional trends and developments in multilateral peace operations
- III. Table of multilateral peace operations, 2019
3. Armed conflict and peace processes in the Americas
- Overview
- I. Key general developments in the region
- II. Armed conflict and the peace process in Colombia
- III. Armed conflict in Mexico
4. Armed conflict and peace processes in Asia and Oceania
- Overview
- I. Key general developments in the region
- II. Armed conflict and peace processes in South Asia
- III. Armed conflict and peace processes in South East Asia
5. Armed conflict and peace processes in Europe
- Overview
- I. Key general developments in the region
- II. Armed conflict and the peace process in Ukraine
6. Armed conflict and peace processes in the Middle East and North Africa
- Overview
- I. Key general developments in the region
- II. Armed conflict and peace processes in Iraq, Syria and Turkey
- III. The Israeli–Palestinian conflict and peace process
- IV. Armed conflict and peace processes in North Africa
- V. Armed conflict and peace processes in Yemen
7. Armed conflict and peace processes in sub-Saharan Africa
- Overview
- I. Key general developments in the region
- II. Armed conflict and peace processes in the Sahel and Lake Chad region
- III. Armed conflict and peace processes in Central Africa
- IV. Armed conflict and peace processes in the Horn of Africa
Part II. Military spending and armaments, 2019
8. Military expenditure
- Overview
- I. Global developments in military expenditure, 2019
- II. Regional developments in military expenditure, 2019
- III. Spending on military equipment by European members of the North Atlantic Treaty Organization
- IV. Transparency in military expenditure
9. International arms transfers and developments in arms production
- Overview
- I. Developments among the suppliers of major arms, 2015–19
- II. Developments among the recipients of major arms, 2015–19
- III. Transparency in arms transfers
- IV. The financial value of states’ arms exports
- V. The 100 largest arms-producing and military services companies, 2018
10. World nuclear forces
- Overview
- I. US nuclear forces
- II. Russian nuclear forces
- III. British nuclear forces
- IV. French nuclear forces
- V. Chinese nuclear forces
- VI. Indian nuclear forces
- VII. Pakistani nuclear forces
- VIII. Israeli nuclear forces
- IX. North Korea’s military nuclear capabilities
- X. Global stocks and production of fissile materials, 2019
Part III. Non-proliferation, arms control and disarmament, 2019
11. Nuclear disarmament, arms control and non-proliferation
- Overview
- I. Russian–United States nuclear arms control and disarmament
- II. North Korean–United States nuclear diplomacy
- III. Implementation of the Joint Comprehensive Plan of Action
- IV. Multilateral nuclear arms control, disarmament and non-proliferation treaties and initiatives
12. Chemical and biological security threats
- Overview
- I. Allegations of use of chemical weapons in Syria
- II. Use of novichok agents
- III. Chemical arms control and disarmament
- IV. Biological weapon disarmament and non-proliferation
13. Conventional arms control and new weapon technologies
- Overview
- I. Global instruments for conventional arms control
- II. The group of governmental experts on lethal autonomous weapon systems
- III. Creeping towards an arms race in outer space
14. Dual-use and arms trade controls
- Overview
- I. The Arms Trade Treaty
- II. Multilateral arms embargoes
- III. The multilateral export control regimes
- IV. Developments in the European Union’s dual-use and arms trade controls
Annexes
Annex A. Arms control and disarmament agreements
- I. Universal treaties
- II. Regional treaties
- III. Bilateral treaties
Annex B. International security cooperation bodies
- I. Bodies with a global focus or membership
- II. Bodies with a regional focus or membership
- III. Strategic trade control regimes
Annex C. Chronology 2019
About the authors

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SIPRI Yearbook 2020

I. US nuclear forces

Chapter:: 10. World nuclear forces
Source:: SIPRI Yearbook 2020
Author(s):: Shannon N. Kile, Hans M. Kristensen

As of January 2020, the United States maintained a military stockpile of approximately 3800 nuclear warheads, roughly the same number as in January 2019. The stockpile included approximately 1750 deployed nuclear warheads, consisting of about 1600 strategic and 150 non-strategic (or tactical) warheads. In addition, about 2050 warheads were held in reserve and around 2000 retired warheads were awaiting dismantlement (385 fewer than the estimate for January 2019), giving a total inventory of approximately 5800 nuclear warheads (see table 10.2).

Citation (MLA):: Kile, Shannon N., and Hans M. Kristensen. "10. World nuclear forces." SIPRI Yearbook. SIPRI. Oxford: Oxford University Press. 2016. Web. 28 Mar. 2025. <https://www.sipriyearbook.org/view/9780198869207/sipri-9780198869207-chapter-010-div1-122.xml>.
Citation (APA):: Kile, S., & Kristensen, H. (2016). 10. World nuclear forces. In SIPRI, SIPRI Yearbook 2020: Armaments, Disarmament and International Security. Oxford: Oxford University Press. Retrieved 28 Mar. 2025, from https://www.sipriyearbook.org/view/9780198869207/sipri-9780198869207-chapter-010-div1-122.xml
Citation (Chicago):: Kile, Shannon N., and Hans M. Kristensen. "10. World nuclear forces." In SIPRI Yearbook 2020: Armaments, Disarmament and International Security, SIPRI. (Oxford: Oxford University Press, 2016). Retrieved 28 Mar. 2025, from https://www.sipriyearbook.org/view/9780198869207/sipri-9780198869207-chapter-010-div1-122.xml

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