First Army Division East
- Headquarters, First Army Division East, at Fort Knox, Kentucky[3][4]
- 4th Cavalry Brigade, at Fort Knox, Kentucky[5][6]
- 1st Battalion, 311th Regiment (Training Support Battalion)
- 3rd Battalion, 337th Regiment (Training Support Battalion)
- 2nd Battalion, 340th Regiment (Training Support Battalion)
- 3rd Battalion, 383rd Regiment (Training Support Battalion), at St. Louis, Missouri
- 1st Battalion, 409th Regiment (Brigade Engineer Battalion)
- 3rd Battalion, 409th Regiment (Brigade Support Battalion)
- 4th Battalion, 409th Regiment (Brigade Support Battalion)
- 1st Battalion, 410th Regiment (Brigade Engineer Battalion)
- 4th Battalion, 410th Regiment (Brigade Support Battalion)
- 1st Battalion, 411th Regiment (Logistical Support Battalion)
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- 2nd Battalion, 289th Infantry Regiment (Maneuver)
- 1st Battalion, 290th Regiment (Brigade Support Battalion)
- 2nd Battalion, 307th Regiment (Field Artillery)
- 1st Battalion, 335th Regiment (Maneuver)
- 3rd Battalion, 335th Regiment (Training Support Battalion)
- 2nd Battalion, 337th Regiment (Training Support Battalion)
- 2nd Battalion, 338th Regiment (Training Support Battalion)
- 3rd Battalion, 338th Regiment (Training Support Battalion)
- 1st Battalion, 345th Regiment (Brigade Engineer Battalion)
- 1st Battalion, 362nd Regiment (Air Defense Artillery)
- 3rd Battalion, 411th Regiment (Logistical Support Battalion)
- 174th Infantry Brigade, at Fort Dix, New Jersey[9][10]
- 1st Battalion, 307th Regiment (Training Support Battalion)
- 1st Battalion, 309th Regiment (Training Support Battalion)
- 2nd Battalion, 309th Regiment (Training Support Battalion)
- 2nd Battalion, 312th Regiment (Training Support Battalion), at Coraopolis, Pennsylvania
- 3rd Battalion, 312th Regiment (Training Support Battalion)
- 3rd Battalion, 313th Regiment (Logistical Support Battalion)
- 1st Battalion, 314th Regiment (Maneuver)
- 3rd Battalion, 314th Regiment (Field Artillery)
- 1st Battalion, 315th Regiment (Brigade Support Battalion)
- 2nd Battalion, 315th Regiment (Brigade Engineer Battalion)
- 177th Armored Brigade, at Camp Shelby, Mississippi[11][12]
- 1st Battalion, 305th Regiment (Maneuver)
- 2nd Battalion, 305th Regiment (Field Artillery)
- 3rd Battalion, 315th Regiment (Brigade Engineer Battalion)
- 2nd Battalion, 346th Regiment (Training Support Battalion)
- 3rd Battalion, 347th Regiment (Training Support Battalion), at Orlando, Florida
- 2nd Battalion, 348th Regiment (Training Support Battalion)
- 3rd Battalion, 348th Regiment (Training Support Battalion)
- 3rd Battalion, 349th Regiment (Logistical Support Battalion)
- 2nd Battalion, 351st Regiment (Maneuver)
- 2nd Battalion, 410th Regiment (Brigade Support Battalion)
- 188th Infantry Brigade, at Fort Stewart, Georgia[13][14]
- 1st Battalion, 306th Regiment (Infantry)
- 2nd Battalion, 306th Regiment (Field Artillery)
- 4th Battalion, 306th Regiment (Brigade Engineer Battalion)
- 5th Battalion, 306th Regiment (Brigade Support Battalion)
- 2nd Battalion, 345th Regiment (Training Support Battalion), at Fort Jackson, South Carolina
- 3rd Battalion, 345th Regiment (Training Support Battalion)
- 1st Battalion, 346th Regiment (Air Defense Artillery)
- 1st Battalion, 347th Regiment (Training Support Battalion)
- 2nd Battalion, 347th Regiment (Training Support Battalion), at
Fort Gordon , Georgia
- 2nd Battalion, 349th Regiment (Logistical Support Battalion)
- 3rd Battalion, 395th Regiment (Manuever)
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First Army Division West
- Headquarters,
- 5th Armored Brigade, at Fort Bliss, Texas[17][18]
- 1st Battalion, 289th Regiment (Training Support Battalion)
- 2nd Battalion, 290th Regiment (Training Support Battalion)
- 2nd Battalion, 356th Regiment (Logistical Support Battalion)
- 1st Battalion, 360th Regiment (Maneuver)
- 1st Battalion, 361st Regiment (Brigade Support Battalion)
- 3rd Battalion, 361st Regiment (Training Support Battalion)
- 2nd Battalion, 362nd Regiment (Field Artillery)
- 3rd Battalion, 362nd Regiment (Maneuver)
- 2nd Battalion, 363rd Regiment (Training Support Battalion)
- 1st Battalion, 382nd Regiment (Logistical Support Battalion)
- 3rd Battalion, 410th Regiment (Brigade Engineer Battalion)
- CONUS Replacement Center
- 120th Infantry Brigade, at Fort Hood, Texas[19][20]
- 3rd Battalion, 289th Regiment (Training Support Battalion)
- 2nd Battalion, 291st Regiment (Aviation)
- 3rd Battalion, 356th Regiment (Logistical Support Battalion)
- 2nd Battalion, 360th Regiment (Training Support Battalion)
- 1st Battalion, 363rd Regiment (Training Support Battalion)
- 2nd Battalion, 381st Regiment (Training Support Battalion)
- 2nd Battalion, 382nd Regiment (Logistical Support Battalion)
- 1st Battalion, 393rd Regiment (Brigade Support Battalion)
- 2nd Battalion, 393rd Regiment (Brigade Support Battalion)
- 3rd Battalion, 393rd Regiment (Brigade Engineer Battalion)
- 4th Battalion, 393rd Regiment (Training Support Battalion) (Medical)
- 1st Battalion, 395th Regiment (Brigade Engineer Battalion)
- 2nd Battalion, 395th Regiment (Brigade Support Battalion)
- 166th Aviation Brigade, at Fort Hood, Texas[21][22]
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- 1st Battalion, 291st Regiment (Brigade Support Battalion)
- 1st Battalion, 310th Regiment (Brigade Engineer Battalion)
- 1st Battalion, 337th Regiment (Brigade Support Battalion)
- 1st Battalion, 338th Regiment (Training Support Battalion)
- 1st Battalion, 340th Regiment (Training Support Battalion)
- 3rd Battalion, 340th Regiment (Brigade Engineer Battalion)
- 1st Battalion, 351st Regiment (Brigade Support Battalion)
- 2nd Battalion, 361st Regiment (Training Support Battalion)
- 1st Battalion, 383rd Regiment (Training Support Battalion)
- 2nd Battalion, 411th Regiment (Logistical Support Battalion)
- 189th Combined Arms Training Brigade, at Fort Lewis, Washington[25][26]
- 1st Battalion, 356th Regiment (Logistical Support Battalion)
- 1st Battalion, 357th Regiment (Brigade Support Battalion)
- 2nd Battalion, 357th Regiment (Infantry)
- 2nd Battalion, 358th Regiment (Armor)
- 3rd Battalion, 358th Regiment (Field Artillery)
- 3rd Battalion, 360th Regiment (Training Support Battalion)
- 3rd Battalion, 363rd Regiment (Training Support Battalion)
- 1st Battalion, 364th Regiment (Training Support Battalion)
- 2nd Battalion, 364th Regiment (Training Support Battalion)
- 3rd Battalion, 364th Regiment (Brigade Engineer Battalion)
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