The International Committee of the Red Cross (ICRC) has recently launched a FREE online database on customary international humanitarian law (IHL). This database is an expansion of the 2005 published study of IHL, conducted by ICRC in consultation with experts from around the world. It includes two parts.
Part One offers a comprehensive analysis of the customary rules of IHL deemed applicable in international and non-international armed conflict. Part Two contains a summary of State practice relating to most aspects of IHL, as expressed in national legislation, military manuals, official statements, and case law, and the practice of other entities such as international organizations and international courts and tribunals.
One can either search or browse the database and the content, especially the State practice part, will be updated regularly.