The difference in the methodology of conducting military operations by Russian and Ukrainian troops during the war ongoing since February 2022 is striking. It does not result only from the adopted convention of conducting these activities but is conditioned on a much deeper mental level resulting from cultural conditions. They determine the perception and understanding of the phenomenon of war. In other words, the operational and tactical methodology can be adapted to changing realities, provided that the essence of such a change is understood in terms of achieving the assumed military and non-military goals. Furthermore, these goals could be achieved by conducting military operations according to a completely different methodology, probably with much greater effectiveness. Why, in such a perspective, did the Russian side choose such a barbaric way of conducting war, characterising the methodology of military actions of the past decades or even centuries? This paper aims to answer the research question: What premises condition the Russian methodology of military action in the Russian-Ukrainian war of 2022? Empirical methods were employed to obtain an answer to this question.