The war in Ukraine is fast approaching its second anniversary since its commencement on 24 February 2022 as a blatant aggression by Russia. As we discuss in detail in this book, there are multiple international legal issues that arise and require addressing. What is more, the very international legal order is under threat, insofar as the fundamental international law obligations are not being complied with and the basic international rules are utterly ignored. This book discusses a number of international law issues arising from the war in Ukraine. It covers not only the traditional subjects of war, such as jus ad bellum, international criminal law, and the law of neutrality, but also the relatively new issues arising from the economic sanctions against Russia, including aspects of the WTO law and international investment law. This book provides the readers with opportunities to reconsider the various legal aspects of the war in Ukraine.

Introduction.- Part I Military and criminal aspects.- 1. The War in Ukraine under International Law: Its Use of Force and Armed Conflict Aspects.- 2. Use of Force by Russia and jus ad bellum.- 3. Russia's War of Aggression against Ukraine and the Crime of Aggression.- 4. War in Ukraine and the International Court of Justice: Provisional Measures and the Third-Party Right to Intervene in Proceedings.- Part II Economic aspects.- 5. Economic Sanctions against Russia: Questions of Legality and Legitimacy.- 6. Freezing, Confiscation and Management of the Assets of the Russian Central Bank and the Oligarchs: Legality and Possibility under International Law.- 7. Trade Sanctions against Russia and their WTO Consistency: Focusing on Justification under National Security Exceptions.- 8. WTO Dispute Settlement and Trade Sanctions as Permissible Third-Party Countermeasures under Customary International Law.- 9. War in Ukraine and Implications for International Investment Law.- 10. Conclusions - Reflections on War in Ukraine and International Law.