| First Army Division West | |
|---|---|
 Shoulder sleeve insignia and combat service identification badge of the First United States Army | |
| Active | 7 March 2007 – present |
| Country |  United States |
| Branch |  United States Army |
| Role | Training Support |
| Size | Division |
| Part of | First United States Army |
| Garrison/HQ | Fort Cavazos, Texas |
| Motto(s) | First in the West |
| Engagements | Operation Iraqi Freedom Operation New Dawn Operation Enduring Freedom Horn of Africa Kosovo |
| Commanders | |
| Current commander | MG William A. Ryan III |
| Command Sergeant Major | Vacant |
| Insignia | |
| Distinctive unit insignia |  |
| Flag |  |
The First Army Division West is a division of the First United States Army. With its new role, the First Army developed two subordinate multi-component headquarters – one division to support the western United States and the other to support the eastern United States. First Army Division East was activated at Fort Meade, Maryland. 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.