The research aimed to outline the features of "new normal" communication behavior of young military leaders due to the COVID-19 pandemic influence. To study this critical problem we used some general scientific and empirical methods like literature analysis, synthesis and theoretical modelling, pedagogical experience, statistical data processing. The author found that the changes include development of closed and indirect forms, introduction of new lexical, grammatical, and stylistic units, fake information spread, misuse of information and communication technologies (ICT), periodical refusal to message with non-verbal tools. The findings show that professional discourse among young military leaders changes fast because of the COVID-19 pandemic. And the transformations involve different communication behavior, the more significant role of leaders in study group especially in the context of peer-to-peer learning, critical thinking development, independent production and comprehension of professional utterances, higher responsibility of a speaker. The experiment demonstrates that military officers and cadets are likely to cope with new "rules of the game" and they continue to carry out security tasks prioritizing discipline, considerable motivation, psychological readiness to high-risk conditions and adaptability to counteract dramatic challenges. The article is one of the early researches reviewing the features of young military leaders' discourse and describing its current transformations. The research can contribute to developement of recommendations for professional discourse improvements and, consequently, to enhance the efficiency of professional activities of military officers.