A gold rope encircling a blue ribbon with “*4th Combat Engineer Battalion * 4th Marine Division” around a gold chain, encircling a red circle. In the red circle, at the 12 of the clock position is the Eagle Globe and Anchor (EGA). Under the EGA is a gold, three-turreted-castle with “25 August 1943” written on the foundation stone and the 4th Marine Division “red Diamond” center directly in the front of the castle. Below the castle is the Bn motto, “One Team one fight.”
Reactivated on 1 November 1951 at Baltimore, Maryland, as Headquarters Company, 1st Engineer Battalion. Redesignated 1 July 1962 as 4th Engineer Battalion, 4th Marine Division.
Redesignated 1 June 1976 as 4th Combat Engineer Battalion, 4th Marine Division. Participated in numerous training exercises throughout the 1970s and 1980s. Called to Active Duty December 1990 to participate in the Persian Gulf War. Released from Active Duty May 1991.
Global War on Terror
In January 2003 the Battalion activated and deployed personnel in support of the initial invasion of the Iraq War (Operation Iraqi Freedom). December 2004 activated and deployed personnel to serve as members of the 5th Civil Affairs Group and continue to support Operation Iraqi Freedom and Operation Enduring Freedom. Eight members of the battalion were killed while on operations in Iraq.