Here's the Active-Duty OB for the U.S. Army from 1992 to present.
I Corps: Fort Lewis, WA
6th Infantry Division (Mechanized): Fort Wainwright, AK
9th Infantry Division (Mechanized): Fort Lewis, WA
6th Armored Cavalry Regiment: Fort Lewis, WA
II Corps: Fort Patton, AZ
3rd Armored Division: Fort Patton, AZ
8th Infantry Division (Mechanized): Fort Patton, AZ
14th Armored Cavalry Regiment: Fort Huachucha, AZ
III Corps: Fort Hood, TX
1st Cavalry Division: Fort Hood, TX
2nd Armored Division: Fort Hood, TX
3rd Infantry Division (Mechanized): Fort Polk, LA
5th Infantry Division (Mechanized): Fort Polk, LA
3rd Armored Cavalry Regiment: Fort Hood, TX
V Corps: Fort Riley, KS
5th Armored Division: Fort Knox, KY
1st Infantry Division (Mechanized): Fort Riley, KS
2nd Armored Cavalry Regiment: Fort Knox, KY
VIII Corps: Fort Pershing, Deming, NM
1st Armored Division: Fort Pershing, NM
4th Armored Division: Fort Bliss, TX
4th Infantry Division (Mechanized) Fort Carson, CO
7th Infantry Division (Mechanized): Fort Carson, CO
9th Armored Cavalry Regiment: Fort Bliss, TX
X Corps: Fort Bradley, Mexicali, BC
23rd “Americal” Infantry Division (Mechanized): Fort Bradley, BC
17th Airborne Division (Air Assault): Fort Collins, Santa Rosalia, BC
10th Armored Cavalry Regiment: Fort Bradley, BC
XVIII Airborne Corps: Fort Bragg, NC
82nd Airborne Division: Fort Bragg, NC
101st Airborne Division (Air Assault): Fort Campbell, KY
10th Mountain Division: Fort Drum, NY
24th Infantry Division (Mechanized): Fort Stewart, GA
12th Armored Cavalry Regiment (Light): Fort Bragg, NC
U.S. Army South: Roosevelt Roads, PR
IV Corps: Quarry Heights, Panama
11th Airborne Division: Fort Clayton, Panama
U.S. Army Pacific: Fort Shafter, HI
IX Corps: Fort Shafter, HI
2nd Infantry Division: Fort Buckner, Saipan/Fort Stillwell, Guam
25th Infantry Division (Light) Schofield Barracks, HI
173rd Airborne Brigade: Kruger Barracks, Tinian
U.S. Army UK: Alconbury
VII Corps: Greenham Common
83rd Infantry Division (Mechanized): Division HQ at Camp Bulford, Salisbury Plain
11th Armored Cavalry Regiment: Cultybraggan, Stirling
U.S. Army Special Operations Command: Fort Bragg, NC
75th Infantry Regiment (Ranger): Fort Benning, GA
1st Battalion: Fort Benning, GA
2nd Battalion: Fort Bliss, TX
3rd Battalion: Fort Lewis, WA
4th Battalion: Fort Benning, GA
1st Special Forces Group: Torii Station, Okinawa
3rd Special Forces Group: Fort Campbell, KY
5th Special Forces Group: Fort Carson, CO
7th Special Forces Group: Fort Bragg, NC
10th Special Forces Group: Credenhill, UK
160th Aviation Regiment (Special Operations): Fort Campbell, KY
Note:
II Corps gains the 40th Infantry Division (Mechanized) (CA NG) upon mobilization
V Corps gains the 35th Infantry Division (Mechanized) (KS, NB, KY NG) upon mobilization
POMCUS Sets for two additional divisions are held in the U.K. for VII Corps.