The events of world history and modern armed confrontations have left numerous fortifications, battlefields, various types of weapons, most of which can be considered as a powerful resource for tourism development. The constant interest of people in military history, historical battles, battles and other military heritage promotes military tourism. However, despite the presence of a certain array of research and publications on various aspects of the development of this type of tourism, basic research in the definition and classification of military tourism has not been identified. Therefore, the theoretical justifications of the essence of military tourism as an innovative direction of extreme and cognitive tourism are timely and relevant. To achieve this goal, an analysis of the main theoretical provisions and principles of military tourism, covered in domestic and foreign scientific publications. It has been found that in Western scientific literature, military tourism or military heritage tourism functions alongside such terms as "blood tourism", dark tourism and tanatourism, while in the Ukrainian scientific literature it is given a place among extreme, entertainment and specialized types of tourism. Based on the analysis of scientific discussions and already proposed criteria for tourism identification, it is proposed to understand military tourism as one of the types of tourism, which involves visiting historical and modern military sites / institutions / locations, attracting tourists to the realities of modern military life, in safe military events or their historical reconstructions, etc. The main motives of tourists for military travel are described. The typification of the main criteria and principles of classification of military tourism in tourist activity is given. The author's classification of types of military tourism is offered, according to which military-historical, military and military-event types of tourism are distinguished.