So this is the 1st Armored Division Order of Battle for Desert Storm in 1991.
Seems close enough for me to consider what can be surviving equipment and units post the 19 November 1989 war date for 3rd edition.
Might be nice to put unit names and colors to the all horse conversions, and to know which units remain mechanized for the threat from the south.
http://www.tim-thompson.com/gwob1stcav.html
1st Brigade, 1st Cavalry Division
3d Battalion, 32d Armor (Fort Hood) (M-1A1)
2d Battalion, 5th Cavalry (Fort Hood) [M-2]
1st Battalion, 8th Cavalry (Fort Hood) [M-1]
2d Battalion, 8th Cavalry (Fort Hood) [M-1]
2d Brigade, 1st Cavalry Division
1st Battalion, 32d Armor (Fort Hood) (M-1A1)
1st Battalion, 5th Cavalry (Fort Hood) [M-2]
1st Cavalry Division Artillery
Battery A, 21st Field Artillery [Fort Hood] (MLRS)
Battery A, 333d Field Artillery (Fort Hood) (Target Acquisition Battery)
1st Battalion, 82d Field Artillery [Fort Hood] (M-109) [DS 1st Brigade]
3d Battalion, 82d Field Artillery [Fort Hood] (M-109A3) [DS 2d Brigade]
Cavalry Brigade, 1st Cavalry Division
1st Battalion, 3d Aviation (Fort Hood) (Attack; AH-64)
1st Battalion, 227th Aviation (Fort Hood) (Attack; AH-64)
Company D, 227th Aviation (Fort Hood) (Command)
Company E, 227th Aviation (Fort Hood) (Assault;UH-60)
2d Squadron, 1st Cavalry (-Air Troop) (Fort Hood) (attached from 2d Armored Division)
1st Squadron, 7th Cavalry (Fort Hood) (M-3)
1st Cavalry Division Support Command
Company F, 227th Aviation (Fort Hood) (AVIM)
15th Support Battalion (Forward) [DS 2d Brigade] (Fort Hood)
27th Support Battalion (Main) (Fort Hood)
115th Support Battalion (Forward) [DS 1st Brigade] (Fort Hood)
1st Cavalry Division Band (Fort Hood)
68th Chemical Company (NBC Defense) (Fort Hood)
157th Ordnance Detachment (TOW/Dragon)(Fort Hood) (attached)
4th Battalion, 5th Air Defense Artillery[Vulcan/Stinger/Avenger] (Fort Hood) [Battalion underwent several organizational transitions during deployment, most significantly gaining three additional Avenger Platoons (formed from personnel of 2d Armored Division's 2d Battalion, 5th Air Defense Artillery) and forming Battery D on 10 December 1990 to control the Avenger assets]
Reconnaissance Platoon, 22d Chemical Company (Frankfurt) (attached from 3d Armored Division)
8th Engineer Battalion (Fort Hood)
123d Engineer Detachment (Terrain) (Fort Hood)
557th Engineer Detachment (Terrain) (Fort Hood)
312th Military Intelligence Battalion (CEWI)(Fort Hood)
545th Military Police Company(Fort Hood)
13th Signal Battalion (Division MSE) (Fort Hood)
OPCON and Attached Units:
44th Chemical Company (NBC Defense) [company (-) consisted of only one smoke and one decon platoon in direct support of 1st Cavalry Division Support Command; one decon platoon served with 1st Brigade, 2d Armored Division; another decon platoon served with 1st Infantry Division] (Fort Hood)
413th Civil Affairs Company (USAR, TX)
145th Public Affairs Detachment (OK ARNG)