User:Noclador/sandbox/Divisional units history

Army divisions

1st Infantry Division

• 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

• 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

• 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

• 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

• 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

• 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

• 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

• 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

• 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

• 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

• 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

• 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

• 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