East and West Riding Regiment
| Dates | Locations | Higher Formation/Remarks |
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| . | The East and West Riding Regiment | . |
| 1999.07.01 | Formed with HQ at Minden House, Pontefract, by amalgamation of 3rd Bn The Prince of Wales's Own Regt of Yorkshire (Yorkshire Volunteers) , 3rd Bn The Duke of Wellington's Regt (Yorkshire Volunteers) and The King's Own Yorkshire Yeomanry (Light Infantry) | . |
| . | Ypres Company (Duke of Wellington's Regiment) at Huddersfield with Pln at Keighley, also Pioneer Pln, amalgamation of C Coy and B Coy 3rd Bn, The Duke of Wellington's Regt; redesignated later as C Doy | . |
| . | Fontenay Company (Duke of Wellington's Regiment) at Barnsley including MG Pln with Pln at Sheffield, amalgamation of HQ Coy and A Coy 3rd Bn, The Duke of Wellington's Regt; redesignated later as D Coy | . |
| . | Quebec Company (Prince of Wales's Own Regiment of Yorkshire) at Mona House, Hull with Mortar Pln at Beverley,redesignation of B Coy 3rd Bn, The Prince of Wales's Own Regt of Yorkshire; redesignated later as A Coy | . |
| . | Imphal Company (Prince of Wales's Own Regiment of Yorkshire) at Worsley Barracks, York with Leeds Rifles Pln at Leeds; Milan Pln at York, redesignation of A Coy 3rd Bn, The Prince of Wales's Own Regt of Yorkshire; redesignated later as B Coy | . |
| . | Minden Company (Light Infantry) at Wakefield with Pln at Batley, Recce Pln at Wakefield, amalgamation of HQ Sqn and C Sqn The King's Own Yorkshire Yeomanry; pln formed or moved later to Doncaster | . |
| 2006.04.01 | HQ moved to York; Minden Coy broken up: Wakefield element transferred to form 299 Para Sqn in 72 Engr Regt RE, Doncaster element transferred to form C (Rifles) Coy 5 Bn R Regt of Fusiliers; companies reorganised: | . |
| . | HQ Company at Worsley Barracks, York, with Pln at Scarborough, amalgamation of York element of B Coy E&WRR and A Coy Tyne Tees Regt | . |
| . | A Company (Prince of Wales's Own Regiment of Yorkshire) at Hull with pln at Beverley and Leeds Rifles Pln at Leeds (the latter transferring from B Coy) | . |
| . | B (Green Howards) Company at Middlesbrough with pln at Northallerton (the latter newly re-formed), redesignation of B Coy Tyne Tees Regt | . |
| . | C Company (Duke of Wellington's Regiment) at Huddersfield with Pln at Keighley | . |
| . | D Company (Duke of Wellington's Regiment) at Barnsley with Pln at Sheffield | . |
| 2006.06.06 | Regiment re-organised as 4th Battalion, The Yorkshire Regiment (14th/15th, 19th and 33rd/76th) formed with HQ at York | . |
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