Challenges to national defence in contemporary geopolitical situation

This study addresses key issues related to the technical protection and restoration of critical railway infrastructure in the Czech Republic when dealing with military and non-military crisis situations. These issues can be divided into problems of organizational nature and technical problems. The study demonstrates how these key issues can be resolved and what steps are required. Ensuring the operational readiness of railway infrastructure is an integral part of successfully managing crisis situations and securing military transport, as well as transport for the national economy and the population.

This article analyses the challenges and perspectives of the European Union's security and defence policy in a new geopolitical era shaped by Russian aggression against Ukraine, growing US-China rivalry, and instability in the EU's neighbourhood. It identifies three key weaknesses that limit the Union's strategic autonomy: insufficient military capabilities, the fragmentation of the defence industry, and a reliance on external suppliers of weapons, equipment, and critical raw materials. Drawing on an interdisciplinary framework that combines political economy, political science, European studies, and security studies, the article examines how existing tools and initiatives, the EDF, PESCO, ASAP, EDIRPA, and the ReArm Europe plan, are responding to these deficits. While these instruments and initiatives demonstrate the EU's ambition to strengthen its security role, their effectiveness remains limited by political divergences and restricted resources. The author concludes that overcoming fragmentation and building sustainable mechanisms for defence cooperation are essential if the EU is to establish itself as a credible security actor in a multipolar world.

This paper explores the potentialities and constraints of building the European Union's strategic autonomy in a new geopolitical era marked by the rivalry between the United States and China, the weakening of the multilateral order, and the consequences of the war in Ukraine. The authors primarily focus on the political, economic, and technological dimensions of autonomy, utilising relevant scientific methods within an interdisciplinary research framework, primarily the analytical-synthetic method, content and comparative analysis, as well as the scenario approach. The findings indicate that the EU is capable of progressively reducing its dependency through the diversification of resources, investments in development, research, and innovation, and the strengthening of digital and technological sovereignty. Simultaneously, however, the Union faces serious limitations, the fiscal constraints of the Member States, the fragmentation of its foreign and security policy, and a persistent reliance on the United States in the area of defence. The EU’s future position will therefore hinge on its ability to consolidate its economic and technological potential and transform it into a unified political will and a credible geopolitical power.

Personal body armor has evolved to address threats typical of contemporary warfare. Artillery effects, particularly fragmentation, have become a significant threat to military personnel, increasing the demand for effective protective solutions. This paper proposes a combined analytical–experimental framework for evaluating the effectiveness of personal body armor against artillery fragmentation. Fragmentation characteristics are examined using mathematical modeling and analytical methods. Additionally, existing body armor evaluation standards and testing methods are reviewed. The results indicate that fragmentation represents the dominant lethal mechanism of artillery fire. Although the V50 ballistic test is commonly used to assess fragment resistance, it does not provide a comprehensive evaluation of real-world protection effectiveness. These findings highlight the need for more advanced and realistic assessment methods.

9/11 made terrorism a part of everyday life on a global basis, attacking civilisation as a whole. As a result, the activity of terrorist organisations reduces people’s sense of security even in their everyday lives, by randomly attacking high public density targets with a huge emotional and publicity impact. The states cannot guarantee security through their law enforcement agencies alone, as the sources of danger have multiplied and become more unpredictable. Therefore, it is more important than ever to involve communities, social organisations, economic and market actors in maintaining common security. Private security thus plays by now an extremely important role in completing public order and security. The radicalisation trend within the terrorist organisations results in a growing number of internal terrorism threats. Given that terrorists aim to choose targets with a likely “success” of their acts, it is important to highlight those whose partial, temporary or total downtime entails consequences which would also make other infrastructures inoperative. Those who from these aspects turn to be the most important, and their continuous and well-functioning operation are essential to the operation of other infrastructures, are called critical infrastructures. If we put the above phenomena together, a clear conflict emerges: critical infrastructure protection, although in most cases not state owned, is also a common security issue, protected mostly by private security services, employing people mainly trained for private security tasks. Our article highlights this problem introducing the scientific background, also suggesting a possible solution for evaluation.