Description: The hybrid wars are characterized by the determination of enemy's activity, dynamism and diversity of his actions. It is also characterized by urgency and tenacity to fight for the capture and retention of initiatives, the transience of the situation and the emergence of unscheduled tasks. Experience of the law-enforcement structures of Ukraine on the territory of Donetsk and Luhansk regions shows that the main form of their application, in this case, is Allied Force Operation (anti-terrorist). It requires a correct determination and forming of a group of heterogeneous forces and means of the State Border Guard Service of Ukraine for participation in such operations. In recent years, due to various reasons, the possibility of units of SBGSU to implement some tasks relating to participation in joint special operations have been considerably improved. First of all, it refers to the protection of the State Border of Ukraine from attacks from the outside (repelling of armed intrusions, dealing with the armed and other provocations), organizing and functioning in the area of conducting AFO (ATO), the search and destroy of subversive-intelligence groups of counter parties and illegal armed formations. Research of units' actions of the Border Guard Service and the ways of their application in the area of conducting AFO (ATO) shows that there are many variants of the correctness of the response to changes in the environment. So the ways to apply capabilities are continuously evolving depending on the changing tactics of the enemy's actions. In future it is advisable to develop options for common actions of units of the SBGSU regarding the tasks to protect and defend the state border. The study provided recommendations on methods of operation of forces and means of the State Border Guard Service of Ukraine in conditions of the Allied Forces Operation regarding repulsion and deterring of armed aggression of Russia in Donbas. Experience of the actions of forces and means of the SBGSU in counter-terrorist operations allows to determine the main methods of action. The method of operation refers to the procedure for the application of forces and means of large unit in a special operation to achieve the goal. These include: security, patrol, search, pursuit, cover (blocking), detention (destruction), escort, border control and general military tactical methods of operation.
Keywords: state border, methods of operation, threat, national security of Ukraine, Allied Force Operation