This article compares military and defence-oriented training, education, and socialisation in seven European countries—Sweden, Germany, France, Latvia, Lithuania, Estonia, and Poland. The comparative case study approach has been employed to identify the systemic solutions employed in the defence education of young people in those European Union countries. The criteria that have guided the analysis of defence education in each country include purpose, characteristics, duration and possible shortcomings. The results identify common content and alternative delivery patterns and establish a research agenda for further study based on gaps in policy knowledge and programme evaluation. The defence education solutions implemented in each of the countries under analysis lead to conclusions and recommendations regarding the need to create common solutions in the area of cooperation between the armed forces and the civilian population of EU countries. The experience of each country shed light not only on defence-oriented training of young people but also on the potential of various activities aimed at strengthening national security.