User:Noclador/sandbox/Divisional units history

Army divisions[edit]

1st Infantry Division[edit]

1st Infantry Division
- 1st Armored Brigade Combat Team
  - 1st Squadron, 4th Cavalry Regiment --> WWII: 4th Mechanized Cavalry Group
  - 1st Battalion, 16th Infantry Regiment --> WWII: 1st Infantry Division
  - 2nd Battalion, 34th Armor Regiment --> WWII: 5th Armored Division
  - 3rd Battalion, 66th Armor Regiment --> WWII: 2nd Armored Division
  - 1st Brigade Engineer Battalion --> WWII: 1st Infantry Division
  - 101st Brigade Support Battalion
- 2nd Armored Brigade Combat Team
  - 5th Squadron, 4th Cavalry Regiment --> WWII: 4th Mechanized Cavalry Group
  - 1st Battalion, 18th Infantry Regiment --> WWII: 1st Infantry Division
  - 1st Battalion, 63rd Armor Regiment --> WWII: 745th Tank Battalion
  - 2nd Battalion, 70th Armor Regiment --> WWII: Company B, 70th Tank Battalion
  - 82nd Brigade Engineer Battalion --> WWII: 1st Battalion, 39th Engineer Combat Regiment
  - 299th Brigade Support Battalion
- 1st Infantry Division Artillery
  - 1st Battalion, 5th Field Artillery Regiment --> WWII: 1st Infantry Division Artillery
  - 1st Battalion, 7th Field Artillery Regiment --> WWII: 1st Infantry Division Artillery
- 1st Combat Aviation Brigade
  - 1st Squadron, 6th Cavalry Regiment --> WWII: 6th Mechanized Cavalry Group (Third Army Reconnaissance)
  - 1st Battalion (Attack), 1st Aviation Regiment
  - 2nd Battalion (General Support), 1st Aviation Regiment
  - 3rd Battalion (Assault), 1st Aviation Regiment
  - 601st Aviation Support Battalion
- 1st Infantry Division Sustainment Brigade
  - Division Sustainment Troops Battalion
  - 541st Division Sustainment Support Battalion

2nd Infantry Division[edit]

2nd Infantry Division
- 1st Stryker Brigade Combat Team
  - 1st Squadron, 14th Cavalry Regiment --> WWII: 14th Mechanized Cavalry Group (9th Armored Division as: 14th Armored Regiment)
  - 2nd Battalion, 3rd Infantry Regiment --> WWII: 3rd Infantry Regiment (Separate)
  - 5th Battalion, 20th Infantry Regiment --> WWII: 6th Infantry Division
  - 1st Battalion, 23rd Infantry Regiment --> WWII: 2nd Infantry Division
  - 23rd Brigade Engineer Battalion --> WWII: 3rd Armored Division
  - 296th Brigade Support Battalion
- 2nd Stryker Brigade Combat Team
  - 8th Squadron, 1st Cavalry Regiment --> WWII: 1st Armored Division (1st Armored Regiment)
  - 2nd Battalion, 1st Infantry Regiment --> WWII: 6th Infantry Division
  - 1st Battalion, 17th Infantry Regiment --> WWII: 7th Infantry Division
  - 4th Battalion, 23rd Infantry Regiment --> WWII: 2nd Infantry Division
  - 14th Brigade Engineer Battalion --> WWII: 1st Battalion, 36th Engineer Combat Regiment
  - 2nd Brigade Support Battalion
- 2nd Infantry Division Artillery
  - 2nd Battalion, 17th Field Artillery Regiment --> WWII: 17th Field Artillery Regiment
  - 1st Battalion, 37th Field Artillery Regiment --> WWII: 2nd Infantry Division Artillery
- 2nd Combat Aviation Brigade
  - 5th Squadron, 17th Cavalry Regiment
  - 2nd Battalion (Assault), 2nd Aviation Regiment
  - 3rd Battalion (General Support), 2nd Aviation Regiment
  - 4th Battalion (Attack), 2nd Aviation Regiment
  - 602nd Aviation Support Battalion "Warhorse"
- 210th Field Artillery Brigade
  - 6th Battalion, 37th Field Artillery Regiment --> WWII: 2nd Infantry Division Artillery
  - 1st Battalion, 38th Field Artillery Regiment --> WWII: 2nd Infantry Division Artillery
  - 70th Brigade Support Battalion
- 2nd Division Sustainment Brigade
  - Division Special Troops Battalion
  - 194th Division Sustainment Support Battalion
  - 11th Engineer Battalion --> WWII: 11th Engineer Combat Battalion
  - 23rd Chemical Battalion --> WWII: 23rd Chemical Smoke Generator Battalion

3rd Infantry Division[edit]

3rd Infantry Division
- 1st Brigade Combat Team|Armored Brigade Combat Team
  - 5th Squadron, 7th Cavalry Regiment --> WWII: 1st Cavalry Division
  - 1st Battalion, 64th Armor Regiment --> WWII: 758th Tank Battalion
  - 3rd Battalion, 69th Armor Regiment --> WWII: 6th Armored Division
  - 2nd Battalion, 7th Infantry Regiment --> WWII: 3rd Infantry Division
  - 10th Brigade Engineer Battalion --> WWII: 3rd Infantry Division
  - 3rd Brigade Support Battalion
- 2nd Armored Brigade Combat Team
  - 6th Squadron, 8th Cavalry Regiment --> WWII: 1st Cavalry Division
  - 3rd Battalion, 67th Armor Regiment --> WWII: 2nd Armored Division
  - 2nd Battalion, 69th Armor Regiment --> WWII: 6th Armored Division
  - 3rd Battalion, 15th Infantry Regiment --> WWII: 3rd Infantry Division
  - 9th Brigade Engineer Battalion --> WWII: 9th Armored Division
  - 703rd Brigade Support Battalion
- 3rd Division Artillery
  - 1st Battalion, 9th Field Artillery Regiment --> WWII: 3rd Infantry Division
  - 1st Battalion, 41st Field Artillery Regiment --> WWII: 3rd Infantry Division
  - 83rd Chemical Battalion --> WWII: 83rd Chemical Battalion
  - 92nd Engineer Battalion --> WWII: 92nd Engineer General Service Regiment
  - 103rd Intelligence and Electronic Warfare Battalion
- 3rd Combat Aviation Brigade
  - 3rd Squadron, 17th Cavalry Regiment
  - 2nd Battalion (General Support), 3rd Aviation Regiment
  - 4th Battalion (Assault), 3rd Aviation Regiment
  - 603rd Aviation Support Battalion
- 3rd Division Sustainment Brigade
  - Division Sustainment Troops Battalion
  - 87th Division Sustainment Support Battalion

4th Infantry Division[edit]

4th Infantry Division
- 1st Stryker Brigade Combat Team
  - 2nd Squadron, 1st Cavalry Regiment --> WWII: 1st Armored Division
  - 4th Battalion, 9th Infantry Regiment --> WWII: 2nd Infantry Division
  - 2nd Battalion, 23rd Infantry Regiment --> WWII: 2nd Infantry Division
  - 1st Battalion, 38th Infantry Regiment --> WWII: 2nd Infantry Division
  - 299th Brigade Engineer Battalion --> WWII: 299th Engineer Combat Battalion
  - 4th Brigade Support Battalion
- 2nd Stryker Brigade Combat Team
  - 3rd Squadron, 61st Cavalry Regiment --> WWII: 601st Tank Destroyer Battalion
  - 1st Battalion, 12th Infantry Regiment --> WWII: 4th Infantry Division
  - 2nd Battalion, 12th Infantry Regiment --> WWII: 4th Infantry Division
  - 1st Battalion, 41st Infantry Regiment --> WWII: 2nd Armored Division
  - 52nd Brigade Engineer Battalion --> WWII: 19th Engineer Combat Regiment
  - 704th Brigade Support Battalion
- 3rd Armored Brigade Combat Team
  - 4th Squadron, 10th Cavalry Regiment --> WWII: 2nd Cavalry Division
  - 1st Battalion, 66th Armor Regiment --> WWII: 2nd Armored Division
  - 1st Battalion, 68th Armor Regiment --> WWII: 6th Armored Division
  - 1st Battalion, 8th Infantry Regiment --> WWII: 4th Infantry Division
  - 588th Brigade Engineer Battalion --> WWII: 388th Engineer General Service Regiment
  - 64th Brigade Support Battalion
- 4th Division Artillery
  - 2nd Battalion, 12th Field Artillery Regiment --> WWII: 2nd Infantry Division
  - 3rd Battalion, 29th Field Artillery Regiment --> WWII: 4th Infantry Division
  - 2nd Battalion, 77th Field Artillery Regiment --> WWII: 2nd Cavalry Division
- 4th Combat Aviation Brigade
  - 6th Squadron, 17th Cavalry Regiment
  - 2nd Battalion (General Support), 4th Aviation Regiment
  - 3rd Battalion (Assault), 4th Aviation Regiment
  - 4th Battalion (Attack), 4th Aviation Regiment
  - 404th Aviation Support Battalion
- 4th Division Sustainment Brigade
  - Division Sustainment Troops Battalion
  - 68th Division Sustainment Support Battalion

10th Mountain Division[edit]

10th Mountain Division
- 1st Infantry Brigade Combat Team
  - 3rd Squadron, 71st Cavalry Regiment --> WWII: 701st Tank Destroyer Battalion
  - 2nd Battalion, 22nd Infantry Regiment --> WWII: 4th Infantry Division
  - 1st Battalion, 32nd Infantry Regiment --> WWII: 7th Infantry Division
  - 1st Battalion, 87th Infantry Regiment --> WWII: 10th Mountain Division
  - 7th Brigade Engineer Battalion --> WWII: 5th Infantry Division
  - 10th Brigade Support Battalion
- 2nd Infantry Brigade Combat Team
  - 1st Squadron, 89th Cavalry Regiment --> WWII: 899th Tank Destroyer Battalion
  - 2nd Battalion, 14th Infantry Regiment --> WWII: 71st Infantry Division
  - 4th Battalion, 31st Infantry Regiment --> WWII: Philippine Division
  - 2nd Battalion, 87th Infantry Regiment --> WWII: 10th Mountain Division
  - 41st Brigade Engineer Battalion --> WWII: 10th Mountain Division (as: 126th Engineer Mountain Battalion)
  - 210th Brigade Support Battalion
- 3rd Infantry Brigade Combat Team
  - 3rd Squadron, 89th Cavalry Regiment --> WWII: 899th Tank Destroyer Battalion
  - 2nd Battalion, 2nd Infantry Regiment --> WWII: 5th Infantry Division
  - 2nd Battalion, 4th Infantry Regiment --> WWII: 4th Infantry Regiment
  - 2nd Battalion, 30th Infantry Regiment --> WWII: 3rd Infantry Division
  - 317th Brigade Engineer Battalion --> WWII: 92nd Infantry Division
  - 710th Brigade Support Battalion
- 10th Division Artillery
  - 3rd Battalion, 6th Field Artillery Regiment --> WWII: 37th Infantry Division
  - 2nd Battalion, 15th Field Artillery Regiment --> WWII: 2nd Infantry Division
  - 5th Battalion, 25th Field Artillery Regiment --> WWII: 10th Mountain Division (as 604th Field Artillery Battalion)
- 10th Combat Aviation Brigade
  - 6th Squadron, 6th Cavalry Regiment --> WWII: 6th Mechanized Cavalry Group (Third Army Reconnaissance)
  - 1st Battalion (Attack), 10th Aviation Regiment
  - 2nd Battalion (Assault), 10th Aviation Regiment
  - 3rd Battalion (General Support), 10th Aviation Regiment
  - 277th Aviation Support Battalion
- 10th Division Sustainment Brigade
  - Division Sustainment Troops Battalion
  - 548th Division Sustainment Support Battalion

25th Infantry Division[edit]

25th Infantry Division
- 2nd Infantry Brigade Combat Team
  - 2nd Squadron, 14th Cavalry Regiment --> WWII: 14th Mechanized Cavalry Group (9th Armored Division as: 14th Armored Regiment)
  - 1st Battalion, 21st Infantry Regiment --> WWII: 24th Infantry Division
  - 1st Battalion, 27th Infantry Regiment --> WWII: 25th Infantry Division
  - 65th Brigade Engineer Battalion --> WWII: 25th Infantry Division
  - 225th Brigade Support Battalion
- 3rd Infantry Brigade Combat Team
  - 3rd Squadron, 4th Cavalry Regiment --> WWII: 4th Mechanized Cavalry Group
  - 2nd Battalion, 27th Infantry Regiment --> WWII: 25th Infantry Division
  - 2nd Battalion, 35th Infantry Regiment --> WWII: 25th Infantry Division
  - 100th Battalion, 442nd Infantry Regiment --> WWII: 442nd Regimental Combat Team
  - 29th Brigade Engineer Battalion --> WWII: 29th Engineer Topographic Battalion
  - 325th Brigade Support Battalion
- 25th Division Artillery
  - 3rd Battalion, 7th Field Artillery Regiment --> WWII: 1st Infantry Division
  - 2nd Battalion, 11th Field Artillery Regiment --> WWII: 24th Infantry Division
  - 125th Intelligence and Electronic Warfare Battalion
- 25th Combat Aviation Brigade
  - 2nd Squadron, 6th Cavalry Regiment --> WWII: 6th Mechanized Cavalry Group
  - 2nd Battalion (Assault), 25th Aviation Regiment
  - 3rd Battalion (General Support), 25th Aviation Regiment
  - 209th Aviation Support Battalion
- 25th Division Sustainment Brigade
  - 25th Division Sustainment Troops Battalion
  - 524th Division Sustainment Support Battalion

1st Armored Division[edit]

1st Armored Division
- 1st Armored Brigade Combat Team
  - 6th Squadron, 1st Cavalry Regiment --> WWII: 1st Armored Division (1st Armored Regiment)
  - 1st Battalion, 36th Infantry Regiment --> WWII: 3rd Armored Division
  - 2nd Battalion, 37th Armor Regiment --> WWII: 4th Armored Division
  - 4th Battalion, 70th Armor Regiment --> WWII: 70th Tank Battalion
  - 16th Brigade Engineer Battalion --> WWII: 1st Armored Division
  - 501st Brigade Support Battalion
- 2nd Armored Brigade Combat Team
  - 1st Squadron, 1st Cavalry Regiment --> WWII: 1st Armored Division (1st Armored Regiment)
  - 1st Battalion, 6th Infantry Regiment --> WWII: 1st Armored Division
  - 1st Battalion, 35th Armor Regiment --> WWII: 4th Armored Division
  - 1st Battalion, 37th Armor Regiment --> WWII: 4th Armored Division
  - 40th Brigade Engineer Battalion --> WWII: 348th Engineer Combat Battalion
  - 47th Brigade Support Battalion
- 3rd Armored Brigade Combat Team
  - 2nd Squadron, 13th Cavalry Regiment --> WWII: 1st Armored Division (1st Armored Regiment)
  - 4th Battalion, 6th Infantry Regiment --> WWII: 1st Armored Division
  - 1st Battalion, 67th Armor Regiment --> WWII: 2nd Armored Division
  - 1st Battalion, 77th Armor Regiment --> WWII: 753rd Tank Battalion
  - 2nd Brigade Engineer Battalion --> WWII: 2nd Infantry Division
  - 123rd Brigade Support Battalion
- 1st Armored Division Artillery
  - 4th Battalion, 1st Field Artillery Regiment --> WWII: 6th Infantry Division
  - 2nd Battalion, 3rd Field Artillery Regiment --> WWII: 9th Armored Division
  - 4th Battalion, 27th Field Artillery Regiment --> WWII: 1st Armored Division
- Combat Aviation Brigade, 1st Armored Division
  - 3rd Squadron (Attack/Reconnaissance), 6th Cavalry Regiment --> WWII: 6th Mechanized Cavalry Group (Third Army Reconnaissance)
  - 1st Battalion (Attack), 501st Aviation Regiment
  - 2nd Battalion (General Support), 501st Aviation Regiment
  - 3rd Battalion (Assault), 501st Aviation Regiment
  - 127th Aviation Support Battalion
- 1st Armored Division Sustainment Brigade
  - Special Troops Battalion
  - 142nd Division Sustainment Support Battalion

1st Cavalry Division[edit]

1st Cavalry Division
- 1st Brigade Combat Team
  - 1st Squadron, 7th Cavalry Regiment --> WWII: 1st Cavalry Division
  - 2nd Battalion, 5th Cavalry Regiment --> WWII: 1st Cavalry Division
  - 2nd Battalion, 8th Cavalry Regiment --> WWII: 1st Cavalry Division
  - 2nd Battalion, 12th Cavalry Regiment --> WWII: 1st Cavalry Division
  - 91st Brigade Engineer Battalion --> WWII: 91st Engineer General Service Regiment
  - 115th Brigade Support Battalion
- 2nd Brigade Combat Team
  - 4th Squadron, 9th Cavalry Regiment --> WWII: 2nd Cavalry Division
  - 1st Battalion, 5th Cavalry Regiment --> WWII: 1st Cavalry Division
  - 1st Battalion, 8th Cavalry Regiment --> WWII: 1st Cavalry Division
  - 1st Battalion, 9th Cavalry Regiment --> WWII: 2nd Cavalry Division
  - 8th Brigade Engineer Battalion --> WWII: 1st Cavalry Division
  - 15th Brigade Support Battalion
- 3rd Brigade Combat Team
  - 6th Squadron, 9th Cavalry Regiment --> WWII: 2nd Cavalry Division
  - 2nd Battalion, 7th Cavalry Regiment --> WWII: 1st Cavalry Division
  - 3rd Battalion, 8th Cavalry Regiment --> WWII: 1st Cavalry Division
  - 1st Battalion, 12th Cavalry Regiment --> WWII: 1st Cavalry Division
  - 3rd Brigade Engineer Battalion --> WWII: 24th Infantry Division
  - 215th Brigade Support Battalion
- 1st Cavalry Division Artillery
  - 3rd Battalion, 16th Field Artillery Regiment --> WWII: 9th Armored Division
  - 1st Battalion, 82nd Field Artillery Regiment --> WWII: 1st Cavalry Division
  - 2nd Battalion, 82nd Field Artillery Regiment --> WWII: 1st Cavalry Division
- 1st Air Cavalry Brigade
  - 7th Squadron, 17th Cavalry Regiment
  - 1st Battalion (Attack), 227th Aviation Regiment
  - 2nd Battalion (Assault), 227th Aviation Regiment
  - 3rd Battalion (General Support), 227th Aviation Regiment
  - 615th Aviation Support Battalion "Cold Steel"
- 1st Cavalry Division Sustainment Brigade
  - Special Troops Battalion
  - 553rd Division Sustainment Support Battalion

11th Airborne Division[edit]

11th Airborne Division
- 1st Infantry Brigade Combat Team
  - 5th Squadron, 1st Cavalry Regiment --> WWII: 1st Armored Division (1st Armored Regiment)
  - 1st Battalion, 5th Infantry Regiment --> WWII: 71st Infantry Division
  - 1st Battalion, 24th Infantry Regiment --> WWII: 24th Infantry Regiment
  - 70th Brigade Engineer Battalion --> WWII: 145th Engineer Combat Battalion
  - 25th Brigade Support Battalion
- 2nd Infantry Brigade Combat Team (Airborne)
  - 1st Squadron, 40th Cavalry Regiment --> WWII: 7th Armored Division (40th Armored Regiment)
  - 1st Battalion, 501st Infantry Regiment --> WWII: 101st Airborne Division
  - 3rd Battalion, 509th Infantry Regiment --> WWII: 509th Parachute Infantry Regiment
  - 6th Brigade Engineer Battalion --> WWII: 6th Infantry Division
  - 725th Brigade Support Battalion
- 11th Airborne Division Artillery
  - 2nd Battalion, 8th Field Artillery Regiment --> WWII: 25th Infantry Division
  - 2nd Battalion, 377th Field Artillery Regiment --> WWII: 101st Airborne Division
- Aviation Task Force
  - 1st Battalion (Attack Reconnaissance), 25th Aviation Regiment
  - 1st Battalion (General Support), 52nd Aviation Regiment
- 17th Division Sustainment Support Battalion

82nd Airborne Division[edit]

82nd Airborne Division
- 1st Infantry Brigade Combat Team
  - 3rd Squadron, 73rd Cavalry Regiment --> WWII: 756th Tank Battalion
  - 2nd Battalion, 501st Infantry Regiment --> WWII: 101st Airborne Division
  - 1st Battalion, 504th Infantry Regiment --> WWII: 82nd Airborne Division
  - 2nd Battalion, 504th Infantry Regiment --> WWII: 82nd Airborne Division
  - 127th Brigade Engineer Battalion --> WWII: 11th Airborne Division
- 2nd Infantry Brigade Combat Team
  - 1st Squadron, 73rd Cavalry Regiment --> WWII: 756th Tank Battalion
  - 1st Battalion, 325th Infantry Regiment --> WWII: 82nd Airborne Division
  - 2nd Battalion, 325th Infantry Regiment --> WWII: 82nd Airborne Division
  - 2nd Battalion, 508th Infantry Regiment --> WWII: 82nd Airborne Division
  - 37th Brigade Engineer Battalion --> WWII: 37th Engineer Combat Battalion
- 3rd Infantry Brigade Combat Team
  - 5th Squadron, 73rd Cavalry Regiment --> WWII: 756th Tank Battalion
  - 1st Battalion, 505th Infantry Regiment --> WWII: 82nd Airborne Division
  - 2nd Battalion, 505th Infantry Regiment --> WWII: 82nd Airborne Division
  - 1st Battalion, 508th Infantry Regiment --> WWII: 82nd Airborne Division
  - 307th Brigade Engineer Battalion --> WWII: 82nd Airborne Division
- 82nd Division Artillery
  - 1st Battalion, 319th Airborne Field Artillery Regiment --> WWII: 82nd Airborne Division
  - 2nd Battalion, 319th Airborne Field Artillery Regiment --> WWII: 82nd Airborne Division
  - 3rd Battalion, 319th Airborne Field Artillery Regiment --> WWII: 82nd Airborne Division
- 82nd Combat Aviation Brigade
  - 1st Squadron (Attack/Reconnaissance), 17th Cavalry Regiment
  - 1st Battalion (Attack), 82nd Aviation Regiment
  - 2nd Battalion (Assault), 82nd Aviation Regiment
  - 3rd Battalion (General Support), 82nd Aviation Regiment
  - 122nd Aviation Support Battalion
- 82nd Airborne Division Sustainment Brigade
  - 82nd Special Troops Battalion
  - 82nd Brigade Support Battalion
  - 189th Combat Sustainment Support Battalion
  - 307th Brigade Support Battalion
  - 407th Brigade Support Battalion

101st Airborne Division[edit]

101st Airborne Division
- 1st Infantry Brigade Combat Team|Brigade Combat Team
  - 1st Squadron, 32nd Cavalry Regiment --> WWII: 3rd Armored Division
  - 1st Battalion, 327th Infantry Regiment --> WWII: 101st Airborne Division
  - 2nd Battalion, 327th Infantry Regiment --> WWII: 101st Airborne Division
  - 1st Battalion, 506th Infantry Regiment --> WWII: 101st Airborne Division
  - 326th Brigade Engineer Battalion --> WWII: 101st Airborne Division
  - 426th Brigade Support Battalion
- 2nd Brigade Combat Team
  - 1st Squadron, 75th Cavalry Regiment --> WWII: ???
  - 1st Battalion, 26th Infantry Regiment --> WWII: 1st Infantry Division
  - 1st Battalion, 502nd Infantry Regiment --> WWII: 101st Airborne Division
  - 2nd Battalion, 502nd Infantry Regiment --> WWII: 101st Airborne Division
  - 39th Brigade Engineer Battalion --> WWII: 2nd Battalion, 39th Engineer Combat Regiment
  - 526th Brigade Support Battalion
- 3rd Brigade Combat Team
  - 1st Squadron, 33rd Cavalry Regiment --> WWII: 3rd Armored Division
  - 1st Battalion, 187th Infantry Regiment --> WWII: 11th Airborne Division
  - 3rd Battalion, 187th Infantry Regiment --> WWII: 11th Airborne Division
  - 2nd Battalion, 506th Infantry Regiment --> WWII: 101st Airborne Division
  - 21st Brigade Engineer Battalion --> WWII: 1277th Engineer Combat Battalion
  - 626th Brigade Support Battalion
- 101st Airborne Division Artillery
  - 2nd Battalion, 32nd Field Artillery Regiment --> WWII: 1st Infantry Division
  - 1st Battalion, 320th Field Artillery Regiment --> WWII: 82nd Airborne Division
  - 3rd Battalion, 320th Field Artillery Regiment --> WWII: 82nd Airborne Division
- 101st Combat Aviation Brigade
  - 2nd Squadron (Attack/Reconnaissance), 17th Cavalry Regiment
  - 1st Battalion (Attack), 101st Aviation Regiment
  - 5th Battalion (Assault), 101st Aviation Regiment
  - 6th Battalion (General Support), 101st Aviation Regiment
  - 96th Aviation Support Battalion
- 101st Sustainment Brigade
  - 101st Special Troops Battalion
  - 129th Division Sustainment Support Battalion

173rd Airborne Brigade[edit]

173rd Airborne Brigade
- 1st Squadron, 91st Cavalry Regiment --> WWII: 91st Reconnaissance Squadron
- 1st Battalion, 503rd Infantry Regiment --> WWII: 503rd Parachute Infantry Regiment
- 2nd Battalion, 503rd Infantry Regiment --> WWII: 503rd Parachute Infantry Regiment
- 4th Battalion, 319th Airborne Field Artillery Regiment --> WWII: 82nd Airborne Division
- 54th Brigade Engineer Battalion --> WWII: 1340th Engineer Combat Battalion
- 173rd Support Battalion

Army divisions by still active[edit]

1st Infantry Division - 8×
- 1st Battalion, 16th Infantry Regiment
- 1st Battalion, 18th Infantry Regiment
- 1st Battalion, 26th Infantry Regiment
- 1st Battalion, 5th Field Artillery Regiment
- 1st Battalion, 7th Field Artillery Regiment
- 3rd Battalion, 7th Field Artillery Regiment
- 2nd Battalion, 32nd Field Artillery Regiment
- 1st Brigade Engineer Battalion

2nd Infantry Division - 11×
- 4th Battalion, 9th Infantry Regiment
- 1st Battalion, 23rd Infantry Regiment
- 2nd Battalion, 23rd Infantry Regiment
- 4th Battalion, 23rd Infantry Regiment
- 1st Battalion, 38th Infantry Regiment
- 2nd Battalion, 12th Field Artillery Regiment
- 2nd Battalion, 15th Field Artillery Regiment
- 1st Battalion, 37th Field Artillery Regiment
- 6th Battalion, 37th Field Artillery Regiment
- 1st Battalion, 38th Field Artillery Regiment
- 2nd Brigade Engineer Battalion

3rd Infantry Division - 6×
- 2nd Battalion, 7th Infantry Regiment
- 3rd Battalion, 15th Infantry Regiment
- 2nd Battalion, 30th Infantry Regiment
- 1st Battalion, 9th Field Artillery Regiment
- 1st Battalion, 41st Field Artillery Regiment
- 10th Brigade Engineer Battalion

4th Infantry Division - 5×
- 1st Battalion, 8th Infantry Regiment
- 1st Battalion, 12th Infantry Regiment
- 2nd Battalion, 12th Infantry Regiment
- 2nd Battalion, 22nd Infantry Regiment
- 3rd Battalion, 29th Field Artillery Regiment

5th Infantry Division - 2×
- 2nd Battalion, 2nd Infantry Regiment
- 7th Brigade Engineer Battalion

6th Infantry Division - 4×
- 2nd Battalion, 1st Infantry Regiment
- 5th Battalion, 20th Infantry Regiment
- 4th Battalion, 1st Field Artillery Regiment
- 6th Brigade Engineer Battalion

7th Infantry Division - 2×
- 1st Battalion, 17th Infantry Regiment
- 1st Battalion, 32nd Infantry Regiment

10th Mountain Division - 4×
- 1st Battalion, 87th Infantry Regiment
- 2nd Battalion, 87th Infantry Regiment
- 5th Battalion, 25th Field Artillery Regiment (as 604th Field Artillery Battalion)
- 41st Brigade Engineer Battalion (as: 126th Engineer Mountain Battalion)

11th Airborne Division - 3×
- 1st Battalion, 187th Infantry Regiment
- 3rd Battalion, 187th Infantry Regiment
- 127th Brigade Engineer Battalion

Philippine Division - 1×
- 4th Battalion, 31st Infantry Regiment

24th Infantry Division - 3×
- 1st Battalion, 21st Infantry Regiment
- 2nd Battalion, 11th Field Artillery Regiment
- 3rd Brigade Engineer Battalion

25th Infantry Division - 5×
- 1st Battalion, 27th Infantry Regiment
- 2nd Battalion, 27th Infantry Regiment
- 2nd Battalion, 35th Infantry Regiment
- 2nd Battalion, 8th Field Artillery Regiment
- 65th Brigade Engineer Battalion

37th Infantry Division - 1×
- 3rd Battalion, 6th Field Artillery Regiment

71st Infantry Division - 2×
- 1st Battalion, 5th Infantry Regiment
- 2nd Battalion, 14th Infantry Regiment

82nd Airborne Division - 15×
- 1st Battalion, 325th Infantry Regiment
- 2nd Battalion, 325th Infantry Regiment
- 1st Battalion, 504th Infantry Regiment
- 2nd Battalion, 504th Infantry Regiment
- 1st Battalion, 505th Infantry Regiment
- 2nd Battalion, 505th Infantry Regiment
- 1st Battalion, 508th Infantry Regiment
- 2nd Battalion, 508th Infantry Regiment
- 1st Battalion, 319th Airborne Field Artillery Regiment
- 2nd Battalion, 319th Airborne Field Artillery Regiment
- 3rd Battalion, 319th Airborne Field Artillery Regiment
- 4th Battalion, 319th Airborne Field Artillery Regiment
- 1st Battalion, 320th Field Artillery Regiment
- 3rd Battalion, 320th Field Artillery Regiment
- 307th Brigade Engineer Battalion

92nd Infantry Division - 1×
- 317th Brigade Engineer Battalion

101st Airborne Division - 10×
- 1st Battalion, 327th Infantry Regiment
- 2nd Battalion, 327th Infantry Regiment
- 1st Battalion, 501st Infantry Regiment
- 2nd Battalion, 501st Infantry Regiment
- 1st Battalion, 502nd Infantry Regiment
- 2nd Battalion, 502nd Infantry Regiment
- 1st Battalion, 506th Infantry Regiment
- 2nd Battalion, 506th Infantry Regiment
- 2nd Battalion, 377th Field Artillery Regiment
- 326th Brigade Engineer Battalion

1st Armored Division - 10×
- 1st Squadron, 1st Cavalry Regiment
- 2nd Squadron, 1st Cavalry Regiment
- 5th Squadron, 1st Cavalry Regiment
- 6th Squadron, 1st Cavalry Regiment
- 8th Squadron, 1st Cavalry Regiment
- 2nd Squadron, 13th Cavalry Regiment
- 1st Battalion, 6th Infantry Regiment
- 4th Battalion, 6th Infantry Regiment
- 4th Battalion, 27th Field Artillery Regiment
- 16th Brigade Engineer Battalion

2nd Armored Division - 5×
- 1st Battalion, 41st Infantry Regiment
- 1st Battalion, 66th Armor Regiment
- 3rd Battalion, 66th Armor Regiment
- 1st Battalion, 67th Armor Regiment
- 3rd Battalion, 67th Armor Regiment

3rd Armored Division - 4×
- 1st Squadron, 32nd Cavalry Regiment
- 1st Squadron, 33rd Cavalry Regiment
- 1st Battalion, 36th Infantry Regiment
- 23rd Brigade Engineer Battalion

4th Armored Division - 3×
- 1st Battalion, 35th Armor Regiment
- 1st Battalion, 37th Armor Regiment
- 2nd Battalion, 37th Armor Regiment

5th Armored Division - 1×
- 2nd Battalion, 34th Armor Regiment

6th Armored Division - 3×
- 2nd Battalion, 69th Armor Regiment
- 1st Battalion, 68th Armor Regiment
- 3rd Battalion, 69th Armor Regiment

7th Armored Division - 1×
- 1st Squadron, 40th Cavalry Regiment

9th Armored Division - 3×
- 2nd Battalion, 3rd Field Artillery Regiment
- 3rd Battalion, 16th Field Artillery Regiment
- 9th Brigade Engineer Battalion

1st Cavalry Division - 14×
- 1st Battalion, 5th Cavalry Regiment
- 2nd Battalion, 5th Cavalry Regiment
- 1st Squadron, 7th Cavalry Regiment
- 2nd Battalion, 7th Cavalry Regiment
- 5th Squadron, 7th Cavalry Regiment
- 1st Battalion, 8th Cavalry Regiment
- 2nd Battalion, 8th Cavalry Regiment
- 3rd Battalion, 8th Cavalry Regiment
- 6th Squadron, 8th Cavalry Regiment
- 1st Battalion, 12th Cavalry Regiment
- 2nd Battalion, 12th Cavalry Regiment
- 1st Battalion, 82nd Field Artillery Regiment
- 2nd Battalion, 82nd Field Artillery Regiment
- 8th Brigade Engineer Battalion

2nd Cavalry Division - 5×
- 1st Battalion, 9th Cavalry Regiment
- 4th Squadron, 9th Cavalry Regiment
- 6th Squadron, 9th Cavalry Regiment
- 4th Squadron, 10th Cavalry Regiment
- 2nd Battalion, 77th Field Artillery Regiment

Non-divisional units: Infantry:

3rd Infantry Regiment - 1×
- 2nd Battalion, 3rd Infantry Regiment

4th Infantry Regiment - 1×
- 2nd Battalion, 4th Infantry Regiment

24th Infantry Regiment - 1×
- 1st Battalion, 24th Infantry Regiment

442nd Regimental Combat Team - 1×
- 100th Battalion, 442nd Infantry Regiment

503rd Parachute Infantry Regiment - 2×
- 1st Battalion, 503rd Infantry Regiment
- 2nd Battalion, 503rd Infantry Regiment

509th Parachute Infantry Regiment - 1×
- 3rd Battalion, 509th Infantry Regiment

Cavalry:

4th Mechanized Cavalry Group - 3×
- 1st Squadron, 4th Cavalry Regiment
- 3rd Squadron, 4th Cavalry Regiment
- 5th Squadron, 4th Cavalry Regiment

6th Mechanized Cavalry Group - 4×
- 1st Squadron, 6th Cavalry Regiment
- 2nd Squadron, 6th Cavalry Regiment
- 3rd Squadron, 6th Cavalry Regiment
- 6th Squadron, 6th Cavalry Regiment

14th Mechanized Cavalry Group - 2×
- 1st Squadron, 14th Cavalry Regiment
- 2nd Squadron, 14th Cavalry Regiment

??? - 1×
- 1st Squadron, 75th Cavalry Regiment

91st Reconnaissance Squadron - 1×
- 1st Squadron, 91st Cavalry Regiment

Artillery:

17th Field Artillery Regiment - 1×
- 2nd Battalion, 17th Field Artillery Regiment

Tank Destroyer battalions:

601st Tank Destroyer Battalion - 1×
- 3rd Squadron, 61st Cavalry Regiment
701st Tank Destroyer Battalion - 1×
- 3rd Squadron, 71st Cavalry Regiment
899th Tank Destroyer Battalion - 2×
- 1st Squadron, 89th Cavalry Regiment
- 3rd Squadron, 89th Cavalry Regiment

Tank battalions:

70th Tank Battalion - 2×
- 2nd Battalion, 70th Armor Regiment
- 4th Battalion, 70th Armor Regiment
745th Tank Battalion - 1×
- 1st Battalion, 63rd Armor Regiment
753rd Tank Battalion - 1×
- 1st Battalion, 77th Armor Regiment
756th Tank Battalion - 3×
- 1st Squadron, 73rd Cavalry Regiment
- 3rd Squadron, 73rd Cavalry Regiment
- 5th Squadron, 73rd Cavalry Regiment
758th Tank Battalion - 1×
- 1st Battalion, 64th Armor Regiment

Engineer regiments:

19th Engineer Combat Regiment - 1×
- 52nd Brigade Engineer Battalion

36th Engineer Combat Regiment - 1×
- 14th Brigade Engineer Battalion (1st Battalion)

39th Engineer Combat Regiment - 2×
- 82nd Brigade Engineer Battalion (1st Battalion)
- 39th Brigade Engineer Battalion (2nd Battalion)

92nd Engineer General Service Regiment - 1×
- 92nd Engineer Battalion

91st Engineer General Service Regiment - 1×
- 91st Brigade Engineer Battalion

388th Engineer General Service Regiment - 1×
- 588th Brigade Engineer Battalion

Engineer battalions:

11th Engineer Combat Battalion - 1×
- 11th Engineer Battalion
29th Engineer Topographic Battalion - 1×
- 29th Brigade Engineer Battalion
37th Engineer Combat Battalion
- 37th Brigade Engineer Battalion
145th Engineer Combat Battalion - 1×
- 70th Brigade Engineer Battalion
348th Engineer Combat Battalion - 1×
- 40th Brigade Engineer Battalion
299th Engineer Combat Battalion - 1×
- 299th Brigade Engineer Battalion
1277th Engineer Combat Battalion - 1×
- 21st Brigade Engineer Battalion
1340th Engineer Combat Battalion - 1×
- 54th Brigade Engineer Battalion

Chemical battalions:

23rd Chemical Smoke Generator Battalion - 1×
- 23rd Chemical Battalion
83rd Chemical Battalion - 1×
- 83rd Chemical Battalion