Additionally, they provide general support tactical logistics support to the 1st Marine Division, 3rd Marine Aircraft Wing and I MEF Headquarters Group in order to sustain Marine Air-Ground Task Force (MAGTF) operations beyond the supported unit's organic capabilities.

Activated in January 2003, Combat Service Support Group 15 (CSSG 15) was renamed as CLR 15 in March 2006 after the unit returned from Kuwait where it supported Operation Iraqi Freedom.

From 2014 to present, CLR 15 personnel and equipment deployed to Iraq and Kuwait in support of Operation Inherent Resolve while concurrently providing supply and ground maintenance chains for deployed forces.

[1] As part of the on-going reorganization of the Marine Corps, the regiment was deactivated on 1 July 2020.

[1] A unit citation or commendation is an award bestowed upon an organization for the action cited.