First Army Division West was activated on 7 March 2007, at Fort Carson, Colorado, and was transferred to its current headquarters at Fort Cavazos, Texas as part of the 4th Infantry Division realignment.

First Army Division West was established by the Department of the Army to provide training and readiness oversight and mobilization operations for an area of responsibility spanning the states and territories west of the Mississippi River.

Division West partners with USAR and ARNG Leadership, during Pre, Post and De- Mobilization, to advise, assist and train Army formations, Individual Non-unit Replacements, and Department of the Army Civilians in a multi-component, integrated training environment to achieve Department of the Army directed readiness objectives enabling FORSCOM to provide Combatant Commanders trained and ready forces in support of worldwide requirements.

The division is organized into five brigades located throughout the western United States with 37 total battalions.

https://www.first.army.mil/Mission/Units/Division-West/ This article incorporates public domain material from websites or documents of the United States Army.