The United States will transfer one Patriot MIM-104B air defense system to Ukraine. There are currently two modifications of the Patriot in service with the American Armed Forces: the PAC-2 and the updated PAC-3, most likely the PAC-2 version will be transferred. Training for the calculation of the Patriot air defense system takes 6 months, but it will be accelerated in Germany in a few weeks. The air defense system was put into service in 1982, in terms of the range of destruction, and the version of the PAC-2 missiles has 160 kilometers, the air defense system can be attributed to the medium-range complex. It is assumed that the air defense system will protect against UAVs and cruise missiles, most likely it will be installed deep in the rear. The experience of using the air defense system showed that the complex had problems with the defeat of the UAV, which manifested itself in Saudi Arabia, but this is a topic for a separate discussion, it is worth noting that the air defense system is designed primarily to destroy aircraft and missiles. The air defense system has a minimum target interception altitude of 60 meters, the minimum flight altitude of Caliber missiles is 20 meters, and the flight altitude of Geran-2 drones is also 60 meters. The maximum radar target identification range is 35-50 km at a target flight altitude of 50-100 meters, high-altitude targets are detected at a distance of up to 180 kilometers. The strength of the air defense system is the control system that ensures the use of the Patriot air defense system together with airborne early warning and guidance aircraft of the AWACS type. In such a situation, the Patriot can be in complete radar silence until the very last moment - until it receives target designation from AWACS. The anti-aircraft battery of the Patriot air defense system consists of 4 or 8 launchers, depending on the modification, with 4 missiles on each. On tests of the Patriot PAC-3 air defense system in 1997. The probability of hitting an aircraft with one missile was 80-90%, tactical missiles - from 60 to 80%, the PAC-2 version has a probability of 30-40%. The maximum target interception range is up to 160 km, with a maximum altitude of up to 24 km. The minimum interception range is 3 km, the minimum interception height is 60 meters. The cost of one battery of the Patriot air defense system is from 500 million to a billion dollars, the cost of missiles is from 2 to 4 million dollars per 1 piece. SAM is in service with many countries.