To assess the actual results of training and combat readiness to ensure missile ammunition for fire squads, the Air Defense - Air Force regularly organizes exercises to assemble anti-aircraft missile ammunition. 5V27D is a type of missile ammunition used for the S-125 Pechora air defense missile system. In combat, ensuring missile ammunition for fire squads plays a very important role. To respond well to the task when combat situations occur, every year the Air Defense - Air Force organizes exercises for combat crews to assemble and supply ammunition for fire squads, in order to assess the actual training, command organization level, ammunition assembly ability for combat missions of technical squads as well as the quality of weapons, technical equipment... thereby drawing lessons in organizing training for troops close to the reality and development direction of modern warfare. The alarm bell rang out repeatedly, the combat crews took over the battlefield, focused on assigning tasks to the crew members, and organized the assembly to ensure ammunition for the S-125 Pechora fire squads. The crew members quickly opened the lid of the missile ammunition box and proceeded to remove the ammunition from the box. After that, the officers and soldiers carry out the step of preserving the shell body and checking the mechanical condition. The inspection process is carried out quickly to make a preliminary assessment of the external condition to see if it meets the manufacturer's standards. If it meets the standards, the next steps will be carried out. Otherwise, the bullet will be transferred to another department or stored in the warehouse. The standard rocket was equipped with stabilizing fins by soldiers to keep the missile stable during launch. After the stabilizer wing is installed, the projectile is lifted onto the TZM vehicle and taken to check the internal electrical parameters. This step is extremely important when assessing the quality of the projectile. At the new location, the soldiers installed cables to check the electrical parameters of the bullet. The signal cables from the projectile will be connected to the Crew vehicle, and the electrical parameters and electrical system of the projectile will be checked according to the manufacturer's technical data standards.