Such campaigns included: Aisne-Marne (Summer 1918), Battle of Saint-Mihiel (September 1918), Meuse-Argonne Offensive (Fall of 1918), and November 1918 in Alsace-Lorraine.

Soon after World War II ended, the unit was inactivated 19 February 1946 at Camp Butner, North Carolina.

This did not last long however, with reactivation on 6 July 1948 at Fort Ord, California and subsequent redesignation as the 4th Engineer Battalion in June 1953.

Company A was sent to Pleiku, Vietnam via ship on the MST Gordan and later units on the Buckner, flying from SEATEC on 7 July 1966, to Oakland Naval Shipyard, and then transported to, via San Diego to pick up 3500 Marines, then on to Japan, (Sgt E-6 and above in Japan, overnight some got passes), and then to Qui Nhơn, we were able to secure a palette of beer, and mess food, and other misc supplies and trucked to Pleiku by our squad platoon of dump trucks.

Then the battalion was driven by rough terrain buses to Dragon Mountain and into a huge area of four square miles, in for personnel and heavy equipment, beached landed and then headed north up Highway 1 and convoyed to Tuy Hòa and built the 2nd Brigade of the 8th Infantry 4th ID Base Camp.

Their operations there included activities concerning Tuy Hòa, La Hai, Polei Kleng, Bong Son and its enormous bridge, and the coastal town of Đức Phổ.

Captain Knutzen, a West Point graduate, led the unit through a one-year tour with only one soldier reported as killed in action.

In November 1968, Charlie Company accompanied infantry units of the 4th division on "Operation Tollroad," designed to deter traffic down the Ho Chi Minh Trail.

They were shipped on the USMS Walker, from Oakland Terminal, to San Diego, to Kodak Japan, overnight stop, and landed at Qui Nhơn, and in-country from, 7 July 1966 to 6 June 1967.

It was there that the battalion designated itself "Task Force THOR" and began route clearance operations across Regional Command South.

The battalion supported Operation Enduring Freedom in RC-South for the next 10 months, redeploying to Fort Carson in February 2010.

The battalion's next involvement in the Global War on Terrorism resulted in the 62nd Engineer Company (Sapper) deployment in support of Operation Iraqi Freedom from August 2011 to December 2011, while, simultaneously, the 576th Engineer Company (Clearance) deployment in support of Operation Enduring Freedom from August 2011 to July 2012.

Also, as of August 2013, the 4th Engineer Battalion has accrued more than 95 months of combined deployment time in support of the Global War on Terrorism from 2003 to 2013.