The Encyclopedia is a project of the Geneva Academy of International Humanitarian Law and Human Rights launched on 2 December 2013. The Enyclopedia aims to provide accurate, up-to-date information on weapons, the effects of their use, and their regulation under public international law, in a format that is accessible to non-specialists.+ Find out more
In accordance with the United Nations (UN) Charter and customary international law, there are two accepted exceptions to the general prohibition on use of force. One is when force is used in accordance with a UN Security Council resolution adopted under Chapter VII of the Charter, and the other is in self-defence against an armed attack. For self-defence to be lawful, use of force in response to an armed attack must be both necessary and proportionate.
Last updated on: 01 December 2013