Over the past 20 years, mine action has developed rapidly as a specific sector of expertise within broader relief and development efforts. This third edition of A Guide to Mine Action and Explosive Remnants of War has been prepared by the Geneva International Centre for Humanitarian Demining as an overview for the diplomat, donor, lawyer, practitioner or scholar on the key aspects of mine action. It takes into account key developments of the last few years, particularly the Anti-Personnel Mine Ban Convention 2004 Nairobi Summit on a Mine-Free World and the entry into force of Protocol V to the Convention on Certain Conventional Weapons. The growing relevance of explosive remnants of war (ERW), both at the diplomatic and field-level, is reflected in the content and in the title of the Guide.