This supplement is designed to provide material for one to three class periods depending on how in depth IHL/war crimes are covered in the course. Students are quite engaged with this topic in light of the United States’ protracted involvement in overseas military engagements. This document includes both supplemental reading materials for distribution to students and teacher’s manual commentary, merged together into one comprehensive supplement. The supplement is divided into four main substantive chapters on IHL, selected for their relevance to International Criminal Law (ICL). Each chapter contains 1) materials for distribution to students, including an introduction to the main IHL concepts; cases and primary source materials; and notes and questions for discussion; and 2) materials for professors, including general commentary at the beginning of each chapter and suggested answers and comments for discussion in response to the questions. For purposes of clarity, sections in italics are the teacher’s manual commentary (with the exception of a few excerpted materials contained within those sections that are in regular type for accuracy purposes); sections in regular type are the student reading materials.