The ATACMS (pronounced "attack-'ems") is a short-range (battlefield) ballistic missile used by the U.S. Army. The acronym stands for Army TACtical Missile System. ATACMS are fired from truck-based launchers and have a range of perhaps 60 nautical miles. They are used to strike tactically critical fixed targets within a battlefield (air defense radars, munitions stockpiles, etc.) as opposed to the MLRS system, which is used for battlefield fire support.