Surface-to-air missiles are a vital tool in a country's defense arsenal. These missiles are used to shoot down aircraft and drones within the range of the missile. There are different types of surface-to-air missiles, which vary in range and effectiveness. Some synonyms for surface-to-air missiles include anti-aircraft missiles, air-defense missiles, and SAMs. Various countries manufacture surface-to-air missiles, each with its own name and specifications. For example, Russia's S-400 missile system is considered to be one of the most advanced anti-aircraft missile systems, while the US has developed the Patriot missile system. Regardless of their name or specifications, surface-to-air missiles are an integral part of modern warfare.