1889th Regional Support Group

The 1889th Regional Support Group is a unit of the Montana National Guard stationed at the Silver Bow Readiness Center, Butte, Montana since 2010. The unit deployed in 2023 in support of the Global War on Terror as part of Operation Inherent Resolve, and was awarded the Meritorious Unit Commendation for its service.

Organization

1889th Regional Support Group, in Butte
* 1st Battalion, 163rd [Infantry Regiment (United States)|163rd Cavalry Regiment], in Belgrade
** Headquarters and Headquarters Company, 1st Battalion, 163rd Cavalry Regiment, in Belgrade
** Company A, in Billings
*** Detachment 1, in Belgrade
** Company B, in Missoula
*** Detachment 1, in Kalispell
** Company C, in Great Falls
** Company I, 145th Brigade Support Battalion, at Fort [William Henry Harrison]
*** Detachment 1, in Livingston
* 1st Battalion, 189th [Aviation Regiment (United States)|189th Aviation Regiment], at Helena Army Airfield
** Headquarters and Headquarters Company, 1st Battalion, 189th Aviation Regiment, at Helena Army Airfield
** Company A, 1st Battalion, 189th Aviation Regiment, in Billings
** Company B, 1st Battalion, 189th Aviation Regiment, at Reno Stead Airport
*** Detachment 1, Company B, 1st Battalion, 189th Aviation Regiment, at Helena Army Airfield
** Company C, 1st Battalion, 189th Aviation Regiment, at Rapid City Regional Airport
*** Detachment 1, Company C, 1st Battalion, 189th Aviation Regiment, at Helena Army Airfield
** Company D, 1st Battalion, 189th Aviation Regiment, at Helena Army Airfield
** Company E, 1st Battalion, 189th Aviation Regiment, at Helena Army Airfield
** Company F, 1st Battalion, 189th Aviation Regiment, at Camp Ripley
** Company G, 1st Battalion, 189th Aviation Regiment, at McNary Airfield
** Detachment 1, Company C, 1st Battalion, 112th Aviation Regiment, at Helena Army Airfield
** Detachment 7, Company B, 2nd Battalion, 245th Aviation Regiment, at Helena Army Airfield
** Detachment 4, Company B, 834th Aviation Support Battalion, at Helena Army Airfield
** Detachment 41, Operational Support Airlift Command, at Helena Army Airfield
* 190th Combat Sustainment Support Battalion, in Billings
** Headquarters and Headquarters Company, 190th Combat Sustainment Support Battalion, in Billings
** 143rd Military Police Detachment, in Lewistown
** 260th Engineer Company, in Miles City
*** Detachment 1, 260th Engineer Company, in Culbertson
*** Detachment 2, 260th Engineer Company, in Billings
** 484th Military Police Company, in Malta
*** Detachment 1, 484th Military Police Company, in Glasgow
*** Detachment 2, 484th Military Police Company, in Billings
** 1063rd Ordnance Company, in Billings
*** Detachment 1, in Dillon
* 495th Combat Sustainment Support Battalion, in Kalispell
** Headquarters and Headquarters Company, 495th Combat Sustainment Support Battalion, in Kalispell
** 103rd Public Affairs Detachment, in Helena
** 190th Chemical Reconnaissance Detachment, in Helena
** Detachment 2, 230th Engineer Company, in Anaconda
** 631st Chemical Company, in Missoula
** 639th Quartermaster Company, in Havre
*** Detachment 1, in Libby
*** Detachment 2, in Kalispell
** 1049th Engineer Detachment, in Helena
** 1050th Engineer Detachment, in Helena
** 1051st Engineer Detachment, in Helena
** 1052nd Engineer Detachment, in Helena

Operation Inherent Resolve

Since 2014, the United States, United Kingdom, and a coalition of other nations have supported the efforts of local allies to defeat ISIS in Iraq, Syria, and Libya. In 2023, the Unit was called up to support the Operation by assuming command and control over several support bases in Iraq, Syria, and Kuwait. In this role, the unit provided logistical and security coordination for coalition forces.
The unit returned to the United States in 2024.