This paper investigates the key role of communication in the context of diplomatic functions, with special emphasis on the military envoys of the Republic of Croatia (RO). Communication is a vital element of diplomatic activity, enabling the establishment, maintenance and development of international relations, as well as the realization of national interests. The aim of this research is to investigate the ways in which military envoys of the Republic of Croatia use communication; communication strategies, intercultural communication and communication skills in performing their diplomatic functions and identify the challenges they face in the communication process. Using qualitative research methods, interviews were conducted with military envoys of the Republic of Croatia who served or are serving in various diplomatic missions around the world. The analysis of the collected data reveals the diversity of communication approaches, strategies and challenges that military envoys face in their work. The research results point to the presence of dominant communication elements (knowledge, skills) such as: knowledge and appreciation of cultural differences, building trust with hosts, coordination and communication with diplomatic missions of the Republic of Croatia, and application and management of diplomatic protocol. Through the analysis of the obtained results, this paper provides an insight into the complexity of the role of communication in the diplomatic context of military envoys of the Republic of Croatia and highlights the importance of continuous development of communication skills and adaptation to changing conditions in the international environment. This analysis has implications for the further improvement of the diplomatic activities of the military envoys of the Republic of Croatia and a better understanding of the dynamics of international relations.