The principles and rules of the “law of armed conflict”, first developed by the great thinker Hugo Grotius in the treatise "Three books on the law of war and peace" (1625), have been transformed into modern humanitarian law (IHL). Putin's aggressive war in Ukraine, which spreads the fear of a global war which is felt across the entire planet, completely denies the principles and rules of IHL. It demonstrates a departure from international law and a return to the primitive age.This book analyzes various perspectives of the International Criminal Court, and the alternative judicial ways of enforcing justice as regards the war crimes being committed in Ukraine. The book is intended for international lawyers and practitioners involved in military tribunals. It deals with general humanitarian issues that go beyond the international legal assessment of the war in Ukraine.