3rd Brigade, 91st Division (Training Support)
[21st Support Brigade]
The 3rd Brigade's mission is to provide pre-mobilization leader and collective training assistance and support to the Reserve Component Priority and Traditional Units in California, Nevada and Arizona. The Brigade also provides assistance to civilian authorities during peacetime crises and/or natural disasters.
On October 17, 1999, 3rd Brigade reorganized and integrated with the 21st Support Brigade to combine Active and Reserve Components as the Headquarters, 3rd Brigade, 91st Division (Training Support) located at Travis Air Force Base, California. The Brigade is comprised of the Headquarters and Headquarters Detachment and four subordinate battalions. The 1-363d Training Support Battalion at Camp Parks, California, the 2-363d Training Support Battalion in Phoenix, Arizona, the 3-363d in Los Alamitos, California, and 3-356th Logistics Support Battalion at Fort Hunter Liggett, California, with detachments in Mesa, Arizona and Concord, California.
The 3rd Brigade was originally constituted on August 5, 1917 as the 316th Engineers and assigned to the 91st Division. Deployed to France in 1918, the Brigade saw action with the First U.S. Army. Unit streamers were earned for their efforts in the Ypres-Lys, Meuse-Argonne and Lorraine campaigns. In 1919 the unit returned to the United States and demobilized at the Presidio of San Francisco.
Reconstituted in 1921 as a member of the Organized Reserves, the 316th served in a Reserve status until its re-designation as the 316th Engineer Combat Battalion and ordered to active military service in 1942. Still assigned to the 91st Division, the unit saw combat in the Rome-Arno, North Apennines and Po Valley campaigns during World War II.
Following World War II, the unit was inactivated for two years before being activated again under the 91st Division in 1947. For 12 years, the 316th served as a readiness asset to the Training Division, preparing instructors for service at Army Training Centers.
In 1959, the 316th Engineer Combat Battalion was disbanded and the Headquarters served as a training asset for the 91st Division until 1967. In November 1967, the 316th was reconstituted a s Headquarters, 3rd Brigade, 91st Division (Training).
From 1967 until 1973, the Brigade served as the higher headquarters for battalions of the 363rd Regiment. Inactivated in 1973, the 3rd Brigade was activated again in 1984 and moved to Dublin, California in 1992.
In 1993 the Brigade was reorganized and re-designated as Headquarters, 3rd Brigade, 91st Division (Field Exercise), with the mission of providing small unit collective training for Reserve and National Guard units in Northern California and Nevada.
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