6th Engineer Support Battalion The 6th Engineer Support Battalion ( 6th ESB ) , is an engineering battalion of the Marine Forces Reserve . Their headquarters are based in Portland , Oregon and they fall under the command of the 4th Marine Logistics Group . History . World War II . The Battalion was activated on 1 November 1944 at Guadalcanal as the 6th Engineer Battalion , 6th Marine Division . During World War II , they participated in the Battle of Okinawa and the Occupation of Japan ( August – November 1945 ) . In October 1945 , they were redeployed to Tsingtao , China . The battalion was deactivated 26 March 1946 . 1957 – 1975 . The Battalion was reactivated on 1 November 1957 at Swan Island , Portland , Oregon as the 3rd Engineer Battalion of the Marine Corps Reserve . On 1 July 1962 , they were redesignated as the 5th Engineer Battalion . 1976 – 1997 . Redesignated again on 31 May 1976 as the 6th Engineer Support Battalion ( 6th ESB ) , 4th Force Service Support Group . Elements of the battalion participated in Operation Desert Shield and Operation Desert Storm in Southwest Asia from January til April 1991 Operation Iraqi Freedom . In Operation Iraqi Freedom , 6th ESB was responsible for fueling coalition forces as they moved northward through Iraq . They also provided purified water supplies to the Marine Corps desert and urban encampments . During Iraq ' s worst sandstorm in 20 years , Marines of the 6th ESB constructed the longest fuel line in the history of the Marine Corps . Continued support in 2004 to 2005 was given by 6th Engineer Support Company and Bridge Company A from Battle Creek , Michigan . During this time Engineer Support Company was re - designated as Combat Service Support Company 113 ( CSSC - 113 ) . Missions during this time included base operations in over a dozen different locations and resupply convoys during Operation Phantom Fury in November 2004 . Four Marines were killed in action during this tour . Bridge Company A was attached to the US Army ' s 155th Engineer Group and rebuilt and maintained bridges all over South / Central Iraq . Their most significant repair mission was to repair a highway bridge at Checkpoint 34A ( South of Camp Striker ) on Main Supply Route Tampa during early November 2004 that had been damaged by VBIED attacks in order stop the flow of supplies and reinforcements to Fallujah during the campaign there . Projected to take 7 days to repair , Bridge Company A repaired the bridge while under fire in less than 32 hours . Operation Enduring Freedom . In 2011 , Marines from Engineer Company C deployed with CLB - 4 to Camp Leatherneck , Afghanistan . From 2012 to February 2013 , 200 Marines from various units in the battalion , supported by individual augments from 6th Communications Battalion , deployed under the title of Engineer Company Bravo . The company integrated into Combat Logistics Battalion 2 , serving in Helmand Province . The majority of the company was based out of Camp Leatherneck , with small detachments of Bulk Fuels and Utilities Marines supporting more than a dozen sites throughout the Area of Operations . Combined teams from the engineer , motor transport , and heavy equipment platoons conducted extensive construction projects and road repairs for infantry and special operations units throughout the northern half of Helmand Province .