Introduction: Terry Gill and the Relevance of the Various Notions of Control in Military Operations Under Public International Law

The present volume serves to commemorate the end of an era. With his retirement from the Chair of Military Law at the Law Faculty of the University of Amsterdam at the end of the 2019–2020 academic year, Professor Dr. Terry Gill, who used his chair to study, promote and disseminate military law in the Netherlands, as well as internationally, makes the transition to emeritus professor. This liber amicorum honours professor Gill’s career, and his contribution to international law, specifically to law on the use of force, international humanitarian law, and military law.