This book provides a modern and basic introduction to a branch of international law constantly gaining in importance in international life, namely international humanitarian law (the law of armed conflict). It is constructed in a way suitable for self-study. The subject-matters are discussed in self-contained chapters, allowing each to be studied independently of the others. Among the subject-matters discussed are, inter alia: the Relationship between jus ad bellum / jus in bello; Historical Evolution of IHL; Basic Principles and Sources of IHL; Martens Clause; International and Non-International Armed Conflicts; Material, Spatial, Personal and Temporal Scope of Application of IHL; Special Agreements under IHL; Role of the ICRC; Targeting; Objects Specifically Protected against Attack; Prohibited Weapons; Perfidy; Reprisals; Assistance of the Wounded and Sick; Definition of Combatants; Protection of Prisoners of War; Protection of Civilians; Occupied Territories; Protective Emblems; Sea Warfare; Neutrality; Implementation of IHL.