Approved on 6 February 1930, the 22nd Chemical Battalion Distinctive Unit Insignia—often referred to as a DUI or unit crest—was originally designed for the 1st Chemical Company. A diagonal green band on a blue field represents the Panama Canal where the unit had been assigned, and the dragon is taken from the coat of arms of the 1st Gas Regiment.
Distinctive Unit Insignias are 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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The 22nd Chemical Battalion was originally organized in the National Army as Company C, 30th Engineers on 26 November 1917, but was subsequently converted and redesignated on 13 July 1918 as Company C, 1st Gas Regiment. Company C took part in three World War I campaigns, with two of them—St. Mihiel and Meuse-Argonne—seeing a fairly heavy amount of chemical warfare employed to rout the Germans out of defensive positions.
The Company was reorganized and redesignated in July 1927 as the 1st Chemical Company, with two more redesignations coming in the next fifteen years, first as the 1st Separate Chemical Company (1931) and then reverting back to 1st Chemical Company (1942). It did not receive its current numerical designation until May 1958 when it was redesignated as the 22nd Chemical Company. It was under this designation that the unit served in Vietnam, earning credit for participation in two campaigns, as well as in the Southwest Asia conflict (First Gulf War) where its actions led to a Meritorious Unit Commendation.
In 2004, the unit was redesignated as the 22nd Chemical Battalion and activated at Aberdeen Proving Ground in Maryland. The next year it would deploy to Iraq, where its superior performance resulted in another Meritorious Unit Commendation. While based at Aberdeen, the unit was given a more specific title: 22nd Chemical Battalion (Technical Escort). In October 2015, its title was changed to 22nd Chemical, Biological, Radiological, and Nuclear Battalion, and in 2016 the Battalion relocated to its current station at Fort Bliss in Texas.