Unmanned aircraft systems, i.e. unmanned aerial vehicles paired with control instruments and components for establishing signal communication; are material-technical means of multiple purposes. Military organizations use these resources in war and non-war operations; for the purpose of intelligence gathering, but also as lethal and precise attack tools. The positive aspects of using unmanned aircraft systems have resulted in a state of general frenzy in the military world, and these means are an indispensable part of even the wider military and public discourse. Although the very beginnings of the development of unmanned aircraft systems date back to the 19th century, the global development of technique and technology in recent decades marked a turning point in the transformation and transition of these assets into indispensable tool and weapon of all modern military organizations. Unmanned aerial vehicles in the modern world are mostly equipped with payloads in the form of intelligence-purpose sensors or lethal means of warfare, and are often a platform that combines both purposes and uses. The fact that unmanned aircraft systems are a means of intensive exploitation by military organizations is supported by reports from all major battlefields of the modern era, where they are often proven to be a key strategic advantage for the user. Such successful recorded actions certainly require detailed analyzes and reflections on unmanned aircraft systems as valuable resources, their adequate use, but also methods and ways of opposing them. Unmanned aircraft systems were used by the Croatian Army in the midst of the bloody war for independence in the 90s of the 20th century, but despite the significant contribution of these assets in the implementation of military operations, their potential was largely neglected in the post-war years. Today, the Croatian Army has modest unmanned aircraft systems at its disposal, and is significantly lagging behind global trends in military equipment. About the acquisition of sophisticated unmanned aircraft systems or the development of own products; it is necessary to discuss in detail, analyze and make a decision; rationally thinking about improving the possibilities and capabilities of the Croatian military organization when implementing tasks from the domain of the entire integrated and coordinated system of homeland security.