The 18th Engineer Brigade (Theater Army) is an engineer brigade of the United States Army. It is currently a subordinate unit of 21st Sustainment Command (Theater) and is headquartered at Conn Barracks in Schweinfurt, Germany. Soldiers of the 18th Engineer Brigade provide various supportive duties to other Army units, including construction, engineering, and mechanical work on other Army projects. The brigade served in Europe during World War II, a fact which was included on its Distinctive Unit Insignia when the 20th Engineer Brigade received one on 10 February 1966. The four corners of the crenelated square allude to their four campaigns in World War II, Normandy, Northern France, Rhineland and Central Europe. The 18th Engineer Brigade later deployed to Vietnam, during the Vietnam War, where its battalions saw six years of combat service and supported fourteen campaigns, building infrastructure for both military and civilian projects. The brigade participated in a massive number of road construction projects and airfield constructions, supporting numerous infantry units and operating all over Vietnam. After serving in Vietnam, the brigade became attached to Seventh United States Army. It has since undertaken and completed numerous projects in support of US Army, Europe, and participated in Operation Desert Storm, Operation Enduring Freedom, and Operation Iraqi Freedom. Organization The US Army's 18th Engineer Brigade is a subordinate unit of 21st Sustainment Command (Theater). The brigade has been assigned to Europe since February 2007. The brigade is headquartered at Conn Barracks in Schweinfurt, Germany. The brigade's current commander is Colonel Scott A. Petersen, while its Command Sergeant Major is Lauro F. Obeada. In addition to the brigade's Headquarters and Headquarters Company and the 243rd Engineer Detachment (Construction Management), which is located in Grafenwhoer, Germany, two subordinate engineer battalions are permanently attached: the 15th Engineer Battalion headquartered at Grafenwöhr, Germany, and the 54th Engineer Battalion headquartered at Bamberg, Germany. History World Wars The lineage of the 18th Engineer Brigade can be traced to 29 July 1921, when its predecessor, the 347th Engineers (General Service), was constituted as an Organized Reserves unit. The 347th Engineers would not be activated for almost twenty years, until the military buildup after the United States entered World War II. The unit was ordered into active military service on 6 May 1942 at Camp Claiborne, Louisiana. On 1 August 1942, the unit was reorganized and re-designated as the 347th Engineer General Services Regiment. The Regiment deployed to