Written by a team of international lawyers from Europe, Asia, Africa, and the Caribbean,this book analyses some of the most significant aspects of the ongoing armed conflictbetween the Russian Federation and Ukraine. As challenging as this conflict is for the international legal order, it also offers lessonsto be learned by the States concerned, and by other States alike. The book analysesthe application of international law in this conflict, and suggests ways for this law'sprogressive development. It will be useful to practitioners of international law working at national Ministriesof Defence, Justice, and Foreign Affairs, as well as in Parliaments, to lawyers ofinternational organizations, and to national and international judges dealing withmatters of public international law, international humanitarian law and criminal law.It will also be of interest to scholars and students of international law, and to historiansof international relations. Sergey Sayapin is Assistant Professor in International and Criminal Law at the Schoolof Law of the KIMEP University in Almaty, Kazakhstan. Evhen Tsybulenko is Professor of Law at the Department of Law of the Tallinn Universityof Technology in Tallinn, Estonia.

Since after the Second World War, the crime of aggression is - along with genocide, crimes against humanity and war crimes - a "core crime" under international law. However, despite a formal recognition of aggression as a matter of international criminal law and the reinforcement of the international legal regulation of the use of force by States, numerous international armed conflicts occurred but no one was ever prosecuted for aggression since 1949. This book comprehensively analyses the historical development of the criminalisation of aggression, scrutinises in a detailed manner the relevant jurisprudence of the Nuremberg and Tokyo Tribunals as well as of the Nuremberg follow-up trials, and makes proposals for a more successful prosecution for aggression in the future. In identifying customary international law on the subject, the volume draws upon a wealth of applicable sources of national criminal law and puts forward a useful classification of States legislative approaches towards the criminalisation of aggression at the national level. It also offers a detailed analysis of the current international legal regulation of the use of force and of the Rome Statutes substantive and procedural provisions pertaining to the exercise of the International Criminal Courts jurisdiction with respect to the crime of aggression, after 1 January 2017."

This unique two-volume book covers virtually the whole spectrum of international conflict and security law. It proceeds from values protected by international law (Part I), through substantive rules in which these values are embodied (Part II), to international and domestic institutions that enforce the law (Part III). It subsequently deals with current challenges in the application of rules of international conflict and security law (Part IV), and crimes as the most serious violations of those rules (Part V). Finally, in the section on case studies (Part VI), lessons learnt from a number of conflict situations are discussed. Written by an international team of experts representing all the major legal systems of the world, the book is intended as a reference work for students and researchers, domestic and international judges, as well as for legal advisers to governments and international and non-governmental organisations. Sergey Sayapin is Associate Professor and Associate Dean at KIMEP University, School of Law in Almaty, Kazakhstan. Rustam Atadjanov is Assistant Professor at KIMEP University, School of Law in Almaty, Kazakhstan. Umesh Kadam is formerly Additional Professor at the National Law School of India University, Bangalore, India and Legal Adviser with the International Committee of the Red Cross. Gerhard Kemp is Professor of Law at the University of Derby in the United Kingdom.  Nicolás Zambrana-Tévar is Associate Professor at KIMEP University, School of Law in Almaty, Kazakhstan. Noëlle Quénivet is Professor in International Law at the University of the West of England, Bristol Law School in the United Kingdom.