The young population, as the most prominent component of national power and the driving force for maintaining and preserving society, is considered one of the influential elements on the geopolitical weight and status of countries. In the contemporary era, this population has been significantly impacted by disruptive technologies within digital and multimedia environments, particularly among the "Gen Z/Alpha" generations. Accordingly, the purpose of this research is to explain the impact of digital and multimedia environments on the young population and, consequently, the country's defensive power. This research is applied in nature regarding its objective and employs a descriptive-analytical method. Data were collected using library (documentary) research and surveys/field studies conducted through a focus group comprising 45 specialists and experts. The data were analyzed qualitatively using meta-synthesis and quantitatively as well. The findings indicate the impact of digital and multimedia environments on the young population and the country's defensive power across three domains: the development of education (comprising 5 themes), the growth of individual maturity (comprising 13 themes), and identity transformations (comprising 10 themes). Promoting a culture of media literacy in utilizing these complex environments and aligning perceptions and understanding based on intelligence (with particular attention to the field of cognitive warfare), alongside religious/identity-based teachings and values, is highly crucial. These efforts aim to enhance the individual knowledge level of young people, focusing on maintaining and improving their mental health and physical well-being, ultimately contributing to strengthening national authority and defensive power.