A USMC HIMARS with 11th Marine Regiment’s 5th Battalion launches a reduced range practice rocket M28A1 to support exercise Valiant Shield 2022 on Angaur, Palau, on 8 June 2022. Credit: US Marine Corps photo by Sgt. Sarah Stegall.

The US Marine Corps (USMC) has carried out a high mobility artillery rocket system (HIMARS) rapid infiltration in the Republic of Palau.

The HIMARS rapid infiltration (HI-RAIN) was executed on 8 June by the USMC’s 5th Battalion from 1st Marine Division’s 11th Marine Regiment, currently deployed in Exercise Valiant Shield.

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The event also marks the first time USMC has deployed HIMARS on the island of Angaur.

The HI-RAIN was a result of enhancements provided to the Angaur Airstrip in 2020, during Task Force Koa Moana.

The USMC’s I Marine Expeditionary Force (MEF), based at Camp Pendleton in California, was responsible for providing command and control (C2) for HI-RAIN from a forward location in Guam.

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The exercise aims to provide joint training in a multi-domain environment and allows I MEF to quickly deploy and integrate both lethal and non-lethal capabilities to support naval manoeuvres.

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11th Marine Regiment 5th Battalion Quebec Battery Commander captain Andrew Richards said: “HI-RAIN is the culmination of the targeting process in which, the M142 High Mobility Artillery Rocket System is selected to engage a target.

“This process is based on a multitude of interoperable systems involving intelligence, communications and C2.”

The HI-RAIN can be deployed to support Expeditionary Advanced Base Operations (EABO) by integrating precision fire assets in minimal logistical footprint environments.

Valiant Shield allows the forces in Indo-Pacific to integrate Marine Corps, Navy, Air Force, Army, Space Force and Special Operations units to train together in lethal and multi-axis environments.

Exercising the use of joint forces by integrating with the 133rd Operational Support Squadron from St Paul, Minnesota, the USMC flew from Andersen Air Force Base to the island state south of Peleliu.