It is with great sorrow that we announce the death on July 21, 2015, of a dear friend and colleague, Prof. Olav Riste. Prof. Riste was the dean of Norwegian international historians and one of the most authoritative European historians of his generation. In his long and distinguished career, he was responsible for modernizing the study of military history and of international relations in Norway and for the development of a number of important international conferences and research projects. The current Institute for Defense Studies (IFS) in Oslo – one of Europe’s leading centres of international history and security studies – was mostly his creation and a living testimony of his vision. Those of us who had the fortune to know him and to work with him will remember his profound professional and methodological rigor and miss his elegant irony and wit.