Book excerpt: This book sheds light on various ethical challenges military and humanitarian health care personnel (HCP) face while working in adverse conditions. Contexts of armed conflict, hybrid wars or other forms of violence short of war, as well as natural disasters, all have in common that ordinary circumstances can no longer be taken for granted. Hence, the provision of health care has to adapt, for example, to a different level of risk, to scarce resources, or uncommon approaches due to external incentives or requirements. This affects the practice of health care as well as its ethics. This book offers a panoramic overview on various challenges healthcare faces in extraordinary situations and provides new insights from practitioners’ as well as from academic scholars’ perspectives.