645th Regional Support Group

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

Units
The brigade is made up of the following units:
 * 645th Regional Support Group
 * 645th Headquarters and Headquarters Detachment
 * 13th Quartermaster Detachment (Petroleum Liaison Detachment)
 * 406th Combat Sustainment Support Battalion
 * 406th Headquarters and Headquarters Company
 * 180th Transportation Company (Medium Truck)(Cargo)
 * 182nd Transportation Company (Medium Truck)
 * 301st Quartermaster Company (Water Purification & Distribution)
 * 401st Transportation Company (Medium Truck)
 * 431st Quartermaster Company (Petroleum Pipeline and Terminal Operations)
 * 858th Movement Control Team
 * 919th Transportation Company (Cargo Transfer)
 * 952nd Quartermaster Company (Petroleum Pipeline and Terminal Operations)