Hybrid aggression of the Russian Federation, starting from the illegal annexation of Crimean peninsula and consistent occupation of the territory of Donetsk and Luhansk regions in 2014, was accompanied by massive information campaigns against Ukraine from the aggressor state. 135Features of the Organization of Work of Public... Hybrid component of the conflict was observable since the inception. Information-psychological warfare, humiliation of Ukrainian language and culture, falsification of Ukrainian history, establishment of alternative reality of the distorted information picture of the world by the Russian media were identified as one of the most relevant threats to the national security of Ukraine. Current challenges and threats to the national security of Ukraine determine the overall necessity of finding a viable, adequate, as well as integrated tool, which will make possible to establish consistent cooperation in the security and defence sector. Qualitative analysis of the organization of work of units of the Ministry of Defence of Ukraine during the armed aggression of the Russian Federation against Ukraine in order to develop new effective mechanisms of countering the aggression is of upmost importance. Development of this work on the basis of the unique experience will give the chance to establish effective resistance to destructive information campaigns which are conducted by the external aggressor.