The M142 HIMARS (High Mobility Artillery Rocket System) is a wheeled, self-propelled multiple rocket launcher developed by the United States Army for long-range interdiction bombardment.
HIMARS is a smaller version of the MLRS and is primarily deployed by the U.S. military's rapid deployment forces, the Airborne Forces and Marine Corps, as well as light infantry divisions that can be rapidly transported and used intensively.
The HIMARS can carry six GMLRS (Guided Multiple Launch Rocket System) or one ATACMS (Army Tactical Missile System).
The United States began providing HIMARS to Ukraine in June 2022, and the Ukrainian military began using it in combat the same month.