It is currently a subordinate unit of 21st Sustainment Command (Theater) and is headquartered at Conn Barracks in Schweinfurt, Germany.

The four corners of the crenelated square allude to their four campaigns in World War II, Normandy, Northern France, Rhineland and Central Europe.

The 347th Engineers would not be activated for almost twenty years, until the military buildup after the United States entered World War II.

[4] On 15 June 1947, the regiment was reactivated in the organized reserves headquartered in Salt Lake, Utah, and remained there until it was again inactivated on 16 March 1949.

The advance party of the 18th Engineer Brigade arrived at Saigon's Tan Son Nhut Air Base on 3 September 1965.

[3] Its initial activities centered around rapid development of the port facilities, ammunition dumps, base camps and airfields necessary to support the build-up of US combat forces deploying to Vietnam.

Soon afterwards, Brigade engineers finished construction of a cold storage warehouse at the Qui Nhơn Support Command, the first of its kind in Vietnam.

The goals of the program were to maintain primary missions of the combat support as well as insure the completion of the many projects planned for the 1970 construction operations.

[3] February 1970 saw the completion of a project begun in the summer of the previous year at Qui Nhơn that replaced a temporary floating steel dock with a more permanent structure which could accommodate six ammo barges at once.

The port of Qui Nhơn became one of the few supply points where ammunition for the First and Second Military Regions could be handled in bulk quantities simultaneously.

[6] Prior to the completion of this new facility, the handling of ammunition there had to take place in other areas, near public housing and fuel storage depots.

[3] The Lines of Communication Program, which represented the most significant contribution that the 18th Engineer Brigade had made to the economic growth of Vietnam, consisted of about 1,500 kilometers of road upgrade from 1967 to 1972.

[4] In support of the XXIV Corps, the 18th Brigade mounted what was described as the "most ambitious engineering effort in Vietnam" at the end of January 1971.

Brigade engineers pushed a roadway across the rugged terrain of the northern Quảng Trị Province to the Laotian border and constructed a 3,200-foot (980 m) by 60-foot (18 m) airfield in little more than a month at Khe Sanh Combat Base.

During this period, the Brigade performed numerous construction, rehabilitation and renovation missions in military communities and training areas of the 7th Army.

In April 1991, the Brigade Headquarters, along with elements of the 94th Engineer Battalion (Combat) (Heavy), deployed to Zakho, Iraq in support of Operation Provide Comfort.

[9] During this time, the unit participated in road work, construction of Forward Operating Bases, and other activities that enhanced training readiness in and around Campbell Barracks.

[11] The Brigade spent the first six months of its deployment to Tikrit in central Iraq, working on projects there for Multinational Division-Center under the 10th Mountain Division.

These three are Lieutenant Generals Joe N. Ballard,[19] John W. Morris,[20] and Walter K. Wilson Jr.[21] In addition to commanding the brigade from 1987 to 1990, while it was stationed outside of Karlsruhe in Germany, LTG Ballard had also commanded a company in one of the brigade's subordinate battalions, the 864th Engineer Battalion, during its earlier years in Vietnam.