On May 21, I took part in the 9th European Union in International Affairs (EUIA) Conference in Brussels. Wolfgang Wagner and I presented our paper “Pacifism, Isolationism or Anti-Americanism? Explaining Public Opposition to Supporting Ukraine against Russia’s War of Aggression” as part of the panel “The Ukraine effect in European security and defence: lessons after three years of war”, organized and chaired by Yf Reykers (Maastricht University), who also served as our discussant. The panel further included contributions from Michelle Haas (Ghent University), Jocelyn Mawdsley (Newcastle University), and Elie Perot (Brussels School of Governance). Thanks to Yf Reykers for the constructive discussant points and to the audience for the superbly well-attended panel.