Approved on 18 April 1952, the 35th Engineer Battalion Distinctive Unit Insignia (also referred to as a unit crest or DUI for short) features an arched bend that represents a road, symbolizing the Battalion's participation in the construction of the Alcan (Alsaka-Canadian) Highway for which it received an World War II American Theater campaign streamer. The four fleur-de-lis stand for the four campaigns which the unit took part in during World War II (Northern France, Rhineland, Ardennes-Alsace, Central Europe), evidence of the right thinking behind the unit motto of "Ability Courage Results."The Distinctive Unit Insignia is worn by all Soldiers (except General Officers) in units that have been authorized to be issued the device. It is worn centered on the shoulder loops of the Army Green Service Uniform (AGSU) and the blue Army Service Uniform (ASU, Enlisted only) with the base of the insignia toward the outside shoulder seam. DUIs are not worn on the Dress variations of either uniform, however.
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Assigned to the 1st Engineer Brigade and based at Fort Leonard Wood, the 35th Engineer Battalion is a training unit comprising four Engineering Companies as of Summer 2023.
Originally constituted as the as 1st Battalion, 35th Engineer Regiment in the Regular Army on 1 October 1943, the Battalion served in World War II while designated as the 35th Engineer Combat Battalion. It received its current designation in 1953, and was transferred to Army Training and Doctrine Command to become a training unit following an inactivation period of 16 years (1970 – 1986).
Its battle honors include five World War II campaign streamers (one without inscription for the American Theater) and eleven Vietnam War campaigns, while its combat decorations include a Valorous Unit Award, two Meritorious Unit Commendations, a Luxembour Croix de Guerre, and a Republic of Vietnam Civil Action Honor Medal, First Class.