 The 155th Heavy Brigade Combat Team (HBCT), Mississippi National Guard, assumed the dual role of Garrison Command and Base Defense Operations Center in July 2009, relieving both the 949 BSB and the 1–108th FA.As of March 6, 2010 the 278th Armored Cavalry Regiment (Tennessee Army National Guard) officially took charge of Camp Taji Garrison Command, relieving the 155th.The garrison commander was COL Franklin McCauley.