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645th Regional Support Group

645th Regional Support Group is a United States Army Reserve unit which controls a Combat Sustainment Support Battalion within Michigan.

Organization

The 645th Regional Support Group is a subordinate unit of the 103rd Expeditionary Sustainment Command. As of January 2026 the group consists of the following units:

  • 645th Regional Support Group, in Southfield (MI)
  • Headquarters and Headquarters Company, 645th Regional Support Group, in Southfield (MI)
  • 406th Combat Sustainment Support Battalion, in Ann Arbor (MI)
  • Headquarters and Headquarters Company, 406th Combat Sustainment Support Battalion, in Ann Arbor (MI)
  • 13th Quartermaster Detachment (Petroleum Liaison Team), in Livonia (MI)
  • 180th Transportation Medium Truck Company (Cargo) (EAB Linehaul), in Muskegon (MI)
  • Detachment 1, 180th Transportation Medium Truck Company (Cargo) (EAB Linehaul), in Bay City (MI)
  • 182nd Transportation Medium Truck Company (POL, 7.5K GAL) (EAB Linehaul), in Traverse City (MI)
  • Detachment 1, 182nd Transportation Medium Truck Company (POL, 7.5K GAL) (EAB Linehaul), in Bay City (MI)
  • 301st Quartermaster Company (Water Purification and Distribution), in Grand Rapids (MI)
  • 1st Platoon, 301st Quartermaster Company (Water Purification and Distribution), in Augusta (MI)
  • 401st Transportation Medium Truck Company (PLS) (EAB Tactical), in Augusta (MI)
  • 431st Quartermaster Company (Petroleum Pipeline and Terminal Operation), in Augusta (MI)
  • 858th Transportation Detachment (Movement Control Team), in Bay City (MI)
  • 919th Transportation Company (Inland Cargo Transfer Company — ICTC), in Saginaw (MI)
  • 952nd Quartermaster Company (Petroleum Pipeline and Terminal Operation), in Livonia (MI)

<small>Abbreviations: PLS — Palletized Load System; POL — Petroleum Oil Lubricants; EAB — Echelon Above Brigade</small>

References