This eagerly awaited publication is the result of a major international study into current state practice in international humanitarian law in order to identify customary law in this area. Presented in two volumes, it analyzes the customary rules of IHL and contains a detailed summary of the relevant treaty law and state practice throughout the world. In the absence of ratifications of important treaties in this area, this is a publication of major importance, which identifies the common core of international humanitarian law binding on all parties to all armed conflicts.