export controls, arms control agreements, annual chronologies of major arms control events, military manoeuvres and nuclear explosions. SIPRI Arms Transfers Database Showing all international transfers of major conventional arms since 1950, The SIPRI Arms Transfers Database is the most extensive source of information on international arms transfers available to the public. The database is updated every spring and is useful for anyone seeking to monitor and measure the international flow of major conventional arms. SIPRI Mapping ATT-Relevant Cooperation and Assistance Activities Database The SIPRI Mapping ATT-relevant Cooperation and Assistance Activities Database covers cooperation and assistance activities in regards to arms transfer and small arms and light weapons (SALW) controls since 2012. The database supports state's implementation of two treaties – the 2001 UN Programme of Action on SALW and the 2013 Arms Trade Treaty. SIPRI Arms Industry Database The SIPRI Arms Industry Database reports on the top 100 largest arms-producing and military services companies. SIPRI Multilateral Peace Operations Database This database contains data on personnel, country contributions, fatalities and budgets for all multilateral peace operations from the year 2000 and onwards. SIPRI Military Expenditure Database The Military Expenditure Database reports on the annual military spending of most countries around the world. Events and conferences Within the fields of study, SIPRI arranges numerous workshops, conferences, seminars and lectures, bringing together an all-encompassing spectrum of expertise to exchange views on relevant themes. Among these events, the largest are the Stockholm Forum on Peace and Development, the Stockholm Security Conference and SIPRI Lecture. The 2021 Stockholm Security Conference was held in a virtual format on the topic 'Battlefields of the Future: Trends of Conflict and Warfare in the 21st Century' and gathered over 870 global participants across 17 thematic sessions. In 2022, Stockholm Forum on Peace and Development was held in a hybrid format, convening over 2600 registrants from over 150 countries to live streamed high-level panels and online discussions on the theme of 'From a Human Security Crisis Towards an Environment of Peace'. The 2022 SIPRI Lecture was held on the theme of 'Environment of Peace' and was delivered by HE Helen Clark, former Prime Minister of New Zealand and Administrator of the United Nations Development Programme. Partnerships SIPRI is part of the Stockholm Hub on Environment, Climate and Security, which provides evidence-based insights on building security and prosperity and how to strengthen resilience in the face of a changing climate. The