The SIPRI Yearbook is an authoritative and independent source of data and analysis on armaments, disarmament and international security. It provides an overview of developments in international security, weapons and technology, military expenditure, arms production and the arms trade, and armed conflicts and conflict management, as well as efforts to control conventional, nuclear, chemical and biological weapons.This 54th edition of the SIPRI Yearbook covers developments during 2022, includingUSBLArmed conflict and conflict management, with an overview of global and regional trends in armed conflicts, peace processes and peace operations, as well as a focus on the role of private military and security companiesBEUEUSBLThe war in Ukraine, including its impact on military spending and European arms control, the role of space and cyber domains, and efforts to impose international trade restrictions on RussiaBEUEUSBLMilitary expenditure, international arms transfers and developments in arms productionBEUEUSBLWorld nuclear forces, with an overview of each of the nine nuclear-armed states and their nuclear modernization programmesBEUEUSBLNuclear arms control, featuring developments in the Russian-United States strategic dialogue and multilateral nuclear arms control and disarmament treaties, as well as the response to attacks on Ukrainian nuclear power plantsBEUEUSBLChemical, biological and health security threats, including the investigation of allegations of chemical and biological weapon use and developments in the international legal instruments against chemical and biological warfareBEUEUSBLConventional arms control and regulation of new weapon technologies, with a focus on inhumane weapons and other conventional weapons of humanitarian concern, including efforts to regulate autonomous weapon systemsBEUEUSBLDual use and arms trade controls, including developments in the Arms Trade Treaty, multilateral arms embargoes and export control regimes, and the legal framework of the European Union for such controls.BEUE It also contains annexes listing arms control and disarmament agreements, international security cooperation bodies, and key events in 2022.