Lancastrian and Cumbrian Volunteers
| Dates | Locations | Higher Formation/Remarks |
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| . | The Lancastrian and Cumbrian Volunteers | . |
| 1999.07.01 | Formed with HQ at Kimberley Barracks, Preston, by amalgamation of 4th (V) Bn The King's Own Royal Border Regt and 4th (V) Bn The Queen's Lancashire Regiment | . |
| . | HQ (Quebec) Company at Kimberley Barracks, Preston, formed from HQ Company 4th Bn, The Queen's Lancashire Regiment | . |
| . | A Tobruk (King's Own Royal Border Regiment) Company at Barrow in Furness with Pln at Lancaster, amalgamation of HQ Company and C Company 4th Bn, The King's Own Royal Border Regiment; consolidated later at Barrow | . |
| . | B Somme (Queen's Lancashire Regiment) Company at Preston with Pl at Blackpool, amalgamation of HQ Company and B Company 4th Bn, The Queen's Lancashire Regt; redesignated later as D Company and consolidated at Blackpool | . |
| . | C Sicily (King's Own Royal Border Regiment) Company at Workington with Pln at Carlisle, amalgamation of A Company and D Company 4th Bn, The King's Own Royal Border Regt | . |
| . | D Waterloo (Queen's Lancashire Regiment) Company at Blackburn with Pln at Bury, amalgamation of A Company and C Company 4th Bn, The Queen's Lancashire Regt; redesignated later as B Company | . |
| 2006.04.01 | Companies reorganised (HQ at Preston): | . |
| . | HQ Company at Kimberley Barracks, Preston | . |
| . | A (King's Regiment) Company at Liverpool, transferred from The King's and Cheshire Regt | . |
| . | B (Queen's Lancashire Regiment) Company at Blackburn with Pln at Blackpool, amalgamation of B Coy (less Pln at Bury to new D Coy) and D Coy | . |
| . | C (King's Own Royal Border Regiment) Company at Workington with Plns at Carlisle and Barrow, amalgamation of A Coy and C Coy | . |
| . | D (King's Regiment) Company at Manchester with Pln at Bury, transferred from The King's and Cheshire Regt plus Bury Pln from B Coy | . |
| 2006.07.01 | Renamed 4th Battalion, The Duke of Lancaster's Regiment (King's, Lancashire and Border) | . |
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