Russo-Ukrainian WarThe Russo-Ukrainian War is an ongoing international conflict between Russia, alongside Russian-backed separatists, and Ukraine, which began in February 2014. Following Ukraine's Revolution of Dignity, Russia annexed Crimea from Ukraine and supported pro-Russian separatists fighting the Ukrainian military in the Donbas war. The first eight years of conflict also included naval incidents, cyberwarfare, and heightened political tensions. In February 2022, Russia launched a full-scale invasion of Ukraine.
Law of warThe law of war is the component of international law that regulates the conditions for initiating war (jus ad bellum) and the conduct of warring parties (jus in bello). Laws of war define sovereignty and nationhood, states and territories, occupation, and other critical terms of law. Among other issues, modern laws of war address the declarations of war, acceptance of surrender and the treatment of prisoners of war; military necessity, along with distinction and proportionality; and the prohibition of certain weapons that may cause unnecessary suffering.
International lawInternational law (also known as public international law and the law of nations) is the set of rules, norms, and standards generally recognised as binding between states. It establishes normative guidelines and a common conceptual framework for states across a broad range of domains, including war and diplomacy, economic relations, and human rights. International law differs from state-based domestic legal systems in that it is primarily, though not exclusively, applicable to states, rather than to individuals, and operates largely through consent, since there is no universally accepted authority to enforce it upon sovereign states.
Legality of the Iraq WarPolitical leaders of the US and UK who led the arguments which resulted in the invasion of Iraq have claimed that the war was legal. However, legal experts, including the chairman of the Iraq Inquiry, John Chilcot, who led an investigation with hearings from 24 November 2009 to 2 February 2011, concluded that the process of identifying the legal basis for the invasion of Iraq was unsatisfactory and that the actions of the US and the UK have undermined the authority of the United Nations.
Superior ordersSuperior orders, also known as the Nuremberg defense or just following orders, is a plea in a court of law that a person, whether a member of the military, law enforcement, or the civilian population, should not be considered guilty of committing actions that were ordered by a superior officer or official. The superior orders plea is often regarded as the complement to command responsibility. One of the most noted uses of this plea, or defense, was by the accused in the 1945–1946 Nuremberg trials, such that it is also called the "Nuremberg defense".
Declaration of warA declaration of war is a formal act by which one state announces existing or impending war activity against another. The declaration is a performative speech act (or the signing of a document) by an authorized party of a national government, in order to create a state of war between two or more states. The legality of who is competent to declare war varies between nations and forms of government. In many nations, that power is given to the head of state or sovereign.
Peremptory normA peremptory norm (also called jus cogens) is a fundamental principle of international law that is accepted by the international community of states as a norm from which no derogation is permitted. There is no universal agreement regarding precisely which norms are jus cogens nor how a norm reaches that status, but it is generally accepted that jus cogens bans genocide, maritime piracy, enslaving in general (i.e. slavery as well as slave trade), wars of aggression and territorial aggrandizement, torture, and refoulement.
