The Patriot battery is a surface-to-air missile system used by the United States Army and several allied states. It is the U.S. Armys most advanced air defense system, capable of defeating both high-performance aircraft and tactical ballistic missiles. A typical Patriot battery includes a phased array radar, an engagement control station, computers, power generation and other support vehicles, and several launch stations. The heart of the Patriot battery is the fire control section, consisting of the AN/MPQ-53 or −65/65A Radar Set (RS), the AN/MSQ-104 Engagement Control Station (ECS), the OE-349 Antenna Mast Group (AMG), and the EPP-III Electric Power Plant (EPP) . A Patriot battery consists of about 90 soldiers, but only three soldiers in the engagement control station are required to operate the battery in combat. The Patriot system is built by Raytheon Technologies Corp and is considered one of the most advanced air defense systems in the U.S. arsenal. A newly produced single Patriot battery costs over $1 billion, with $400 million for the system and $690 million for the missiles in a battery.