Operating Units
Today the B-1B is operated by two Bomb Wings, the 7th based at Dyess AFB, Texas, and the 28th based at Ellsworth AFB, South Dakota. The 100 aircraft built originally equipped four front-line Wings. Before 2003, sixty aircraft were "combat-coded" and twenty-seven were designated as "reconstitution aircraft". The latter were not funded for flying, or assigned crews, but they were rotated with the combat-coded aircraft and flown on a regular basis. But in 2003 the decision was taken to reduce the fleet to sixty aircraft, thirty-six of which would be combat-coded.
7th Bomb Wing
The 7th Wing moved from Carswell to Dyess on October 1st 1993, absorbing the 96th Bomb Wing. It operated B-1Bs and C-130s until April 1st 1997, when the C-130s transfered to AMC and the wing became the 7th Bomb Wing. In 2003 Detachment 1 of the USAF Weapons School and Detachment 2 of the 53rd Test and Evaluation Group at Ellsworth (responsible for training B-1 instructors and performing OT&E) moved to Dyess, thereby consolidating all B-1 aircrew training there. Assigned aircraft have a "DY" tailcode. The 13th Bomb Squadron was de-activated on June 3rd 2005.
| Unit | Dates | Markings | Type |
| 9th Bomb Sqd | 01 Oct 1993-date | Black stripe, white bat ("Bats") | Operational |
| 13th Bomb Sqd | 14 Jun 2000-03 Jun 2005 | ("Grim Reapers") | Operational |
| 28th Bomb Sqd | 01 Oct 1994-date | Blue and white checkers ("Mohawk Warriors") | Training unit |
| 337th Bomb Sqd | 01 Oct 1993-01 Oct 1994 | Blue and white checkers | Training unit |
| Det 4, 57th Wing | late 2003-date | - | Parented by Nellis AFB |
| Det 2, 79th TEG | late 2003-late 2004 | - | Parented by Eglin AFB |
| 337th TES | late 2004-date | - | Parented by Eglin AFB (53rd TEG) |
28th Bomb Wing
The 28th Bombardment Wing (Heavy) transitioned to the B-1B from the B-52 in January 1987, initially with two Bomb squadrons. It became the 28th Wing in September 1991, and the 28th Bomb Wing on June 1st 1992 when it transfered to Air Combat Command. Assigned aircraft have an "EL" tailcode.
| Unit | Dates | Markings | Type |
| 34th Bomb Sqd | 19 Sep 2002-date | Red-edged black stripe ("Thunderbirds") | Operational |
| 37th Bomb Sqd | Oct 1985-date | Gold-edged black stripe ("Tigers") | Operational |
| 77th Bomb Sqd | Jan 1987-31 Mar 1995 | Blue stripe with Mt Rushmore | Operational |
| 77th Bomb Sqd | 01 Apr 1997-Sep 2002 | Gold-edged maroon stripe ("War Eagles") | Operational |
| 34th Bomb Sqd | Mar 1994-01 Apr 1997 | Red-edged black stripe | Operational |
| Det 4, 57th Wing | Jun 1992-late 2003 | - | Parented by Nellis AFB |
| Det 2, 79th TEG | Oct 1996-late 2003 | - | Parented by Eglin AFB |
96th Bomb Wing
The 96th Bomb Wing transitioned to the B-1B in June 1985. It became the 96th Wing on June 1st 1992 with the formation of Air Combat Command. It was absorbed by the 7th Wing that moved in from Carswell on October 1st 1993. Assigned aircraft had a "DY" tailcode.
| Unit | Dates | Markings | Type |
| 337th Bomb Sqd | Jun 1985-01 Oct 1993 | Red stripe, gold dragon | Operational |
| 338th CCTS | 01 Jul 1986-01 Oct 1993 | Blue and white checkers | Training unit |
| 4018th CCTS | Jan 1985-01 Jul 1986 | Blue and white checkers | Training unit |
116th Bomb Wing
The Georgia ANG's 116th Fighter Group exchanged its F-15s for B-1Bs to become the 116th Bomb Group on April 1st 1996. The unit gave up its B-1Bs during 2002, and was renamed the 116th Air Control Wing in October of that year, operating the E-8C JSTARS. Assigned aircraft had a "GA" tailcode.
| Unit | Dates | Markings | Type |
| 128th Bomb Sqd | Apr 1996-01 Oct 2003 | ? | Operational |
184th Bomb Wing
The 184th Fighter Group, Kansas ANG, which was equipped with the F-16, became the 184th Bomb Group in July 1994. It was redesignated the 184th Bomb Wing on October 1st 1995. It gave up its B-1Bs and switched to KC-135s in August 2002. Assigned aircraft didn't carry a tailcode.
| Unit | Dates | Markings | Type |
| 127th Bomb Sqd | Apr 1996-01 Oct 2002 | White outlined red band, "Kansas" | Operational |
319th Bomb Wing
The 319th Bombardment Wing (Heavy) transitioned to the B-1B and KC-135R on October 16th 1987. It was re-designated the 319th Bomb Wing on the formation of ACC on June 1st 1992. It was inactivated to become the 319th Bomb Group on October 1st 1993, and in turn this was inactivated on July 16th 1994 after its remaining aircraft had been reassigned. Assigned aircraft had a "GF" tailcode.
| Unit | Dates | Markings | Type |
| 46th Bomb Sqd | Oct 1987-16 Jul 1994 | Blue/orange stripe with "sunflake" | Operational |
366th Wing
The 366th Wing replaced its B-52Hs with B-1Bs in April 1994, moving to Ellsworth from Castle AFB. Its single B-1 squadron moved to Mountain Home AFB between August 1996 and April 1997. As part of the force reorganisation, the 34th moved back to Ellsworth in late 2002 and came under the control of the 28th Bomb Wing. Assigned aircraft had a "MO" tailcode.
| Unit | Dates | Markings | Type |
| 34th Bomb Sqd | 01 Apr 1997-19 Sep 2002 | Red-edged black stripe, red T-bird | Operational |
384th Bomb Wing
The 384th Bombardment Wing (Heavy) received B-1Bs from February 29th 1988. It became the 28th Wing in September 1991 and transfered to ACC on June 1st 1992, becoming the 384th Wing again. Its support facilities were transfered to the 184th Bomb Group. It was redesignated the 384th Bomb Group on January 1st 1994, before being inactivated on October 1st 1994. Assigned aircraft had an "OZ" tailcode.
| Unit | Dates | Markings | Type |
| 28th Bomb Sqd | Jul 1987-01 Oct 1994 | Blue stripe, "Guardian of the Plains" | Operational |
Expeditionary Bomb Squadrons
In recent years, B-1Bs on combat operations have been operated by a number of Expeditionary Bomb Squadrons, which draw aircraft and crews from different units. EBS are not always well-publicised, so this may be an incomplete list.
| Unit | Deployed | Location | Parent Unit | Aircraft source |
| 9th EBS | Enduring/Iraqi Freedom | Al Udeid | 379th AEW | 9th BS |
| 77th EBS | Allied Force | Fairford | 2nd AEG | 77th BS |
| 34th EBS | Enduring Freedom | Diego Garcia | 28th AEW | 34th & 37th BS |
| 37th EBS | Enduring Freedom | Diego Garcia | 40th AEW | ? |
| 40th EBS | Enduring Freedom | Diego Garcia | 40th AEW | ? |
| 405th EBS | Enduring/Iraqi Freedom | Thumrait | 405th AEW | ? |
Test Unit
The 412th Test Wing at Edwards AFB has one aircraft on strength, operated by the 419th Flight Test Squadron. This reports to Air Force Systems Command.
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