In December 2003, the 201st was again called to active duty for Operation Iraqi Freedom. The soldiers trained at Fort Drum, New York in January and February, 2004 before going overseas. While in theater, the battalion was subordinated to the 197th Fires Brigade of the New Hampshire National Guard and commanded by Colonel James Guise. The 197th reported directly to III Corps Artillery, under the command of Brigadier General Richard Formica. The unit spent one year in Iraq before returning home in February 2005. The Battalion Headquarters (HHB) operated out of Camp Cedar II and Tallil Airbase, both of which are approximately west of An Nasiriyah in the Dhi Qar province of Iraq. B Battery and Service Battery were co-located with the HHB. A Battery operated out of Convoy Support Center (CSC) Scania and C Battery operated out of CSC Navistar in Kuwait. The Battalion's mission was convoy security and route clearance for Main Supply Route (MSR) Tampa, the primary route for supplies in Iraq at the time. C Battery would later move north to Camp Cedar II and Tallil Airbase and continue convoy security. Some members of C Battery were also attached to the 1st Cav Division in Jan 2005 to provide extra security in Baghdad (they were stationed in the Hotel District: the Baghdad, Palestine and Sheraton Hotels across the river from the Green Zone) for the first elections while the rest of the unit and battalion trained their replacements.