The war in Ukraine shows that unmanned systems are becoming increasingly popular in modern military conflicts. Drones have proven their effectiveness throughout the performance of intelligence, surveillance and reconnaissance (ISR) tasks, as well as during combat.In this article, the following researches are highlighted: − Map of UAS incidents; − Russian military combat and reconnaissance UAVs; − Ukrainian military combat and reconnaissance UAVs; − Use of ammunition; − Russian use of Iranian drones: operational history, UAV types, technical support, supply logistics, countermeasures and international response; − Use of commercial UAVs; − Measures against UAVs: surface-to-air missiles (SAM), air-to-air missiles (AAM), anti-aircraft artillery – c weapon system (CIWS), portable air defense systems (MANPADS); − Platforms of unmanned aerial systems used by Russia in the conflict in Ukraine; − Platforms of unmanned aerial systems in Ukraine; − Unmanned underwater and surface systems; − Unmanned ground systems. At present, it is observed that a third of the number of drones trained in military missions nevertheless penetrate the air defense system and often reach their target causing immense destruction.