EN
Russia’s aggression against Ukraine and military support provided to Ukraine by third countries resumed the discussion on the continuation of the right to neutrality and its importance in the era of the United Nations Charter. Although some issues in this respect remained disputed in the doctrine, in practice the military support provided to the victim of aggression, i.e. Ukraine, is not considered by states (overwhelmingly) to be contrary to international law. At the same time, the scale of military aid provided to Ukraine has revived the discussion on the threshold required for the transformation of the status of a neutral state into a participant of military conflict. This topic has been analyzed in the last two decades primarily from the perspective of non-international conflicts (combating terrorist groups). The international Russian–Ukrainian military conflict made it necessary to re-verify this issue – both in terms of the scale and types of military equipment supplied, as well as new issues, in particular intelligence support and satellite data.