In 2015, the United States Department of Defense published its long-awaited Law of War Manual making a significant statement on the position of the US government on important military matters. Whilst readers recognise the Manual's legal and strategic importance, they may question whether particular statements of law are legally accurate or complete. This book offers a unique in-depth review of the complete Manual, including revisions, on a paragraph-by-paragraph, line-by-line and word-by-word basis. The authors offer their personal assessment of the DoD's declared view as to the law that regulates the conduct of warfare, a subject of unparalleled current importance. William H. Boothby and Wolff Heintschel von Heinegg offer a balanced, articulate and authoritative critique for readers perusing the Manual in whatever capacity.