The 363rd Regiment Distinctive Unit Insignia was originally approved for the 363rd Infantry Regiment on 10 February 1927 and was subsequently redesignated for the 363rd Regiment on 24 January 1962.
Also known as a unit crest or DUI, 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.
Full guidance on wear of the DUI is found in DA Pamphlet 670-1,
Section 21-22, "Distinctive unit insignia."
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Except for the addition of a yellow (gold) scroll with the unit motto “We Do” inscribed upon it, the 363rd Regiment DUI is identical the unit’s coat of arms. The blue background of the shield denotes the organization’s origins as an Infantry unit. The chevron broken in the middle with the upper side raguly (the heraldic term describing a serrated edge) symbolizes the Hindenburg line the Regiment helped break during World War I. A fleur-de-lis above the break commemorates service in France, while the lion below stands for service in Belgium.
The 363rd Regiment was originally constituted as the 363rd Infantry on 5 August 1917 and assigned to the 91st Division. It served in France during World War I, taking part in three campaigns before returning to the United States and demobilization in May 1919. The Regiment was reconstituted just over two years later with the same designation and once again assigned to the 91st Division (91st Infantry Division after May 1942). It would serve in Italy in three campaigns, with its outstanding service in the Battle of Rimini in 1944 recognized with a Presidential Unit Citation.
World War II would mark the end of the Regiment’s days as a combat unit. In May 1947 it was allotted to the Organized Reserves (today’s Army Reserve) and in May 1959 it was reorganized and redesignated as the 363rd Regiment, an element of the 91st Division (Training).
Over the next forty-plus years, the Regiment would be reorganized numerous times, but in every case its Battalions were designated as elements of the 91st Division up until May 2007, when the 1st, 2nd, and 3rd Battalions, 363rd Regiment were relieved from assignment to the Division. All three Battalions’ were recognized for their excellence as training organizations when they were awarded the Army Superior Unit Award for 2003-2005.
All the Battalions are active as of July 2021. 1st Battalion and 2nd Battalion are serving as Transportation Support Battalions in the 120th Infantry Brigade and 5th Armored Brigade and are stationed at Fort Hood and Fort Bliss, respectively. 3rd Battalion, 363rd Regiment is assigned to the 189th Infantry Brigade as a Combat Sustainment Support Battalion is stationed at Joint Base Lewis-McChord in Washington.