Welsh Volunteers
| Dates | Locations | Higher Formation/Remarks |
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| . | Welsh Volunteers | . |
| 1967.04.01 | Formed in TAVR II with HQ at Maindy Barracks, Cardiff, with companies serving as successors to TA battalions of the Welsh Brigade | . |
| . | HQ Company at Maindy Barracks, Cardiff, successor to 6th Bn The Welch Regt | . |
| . | A Company (Royal Welch Fusiliers) at Wrexham, successor to 4th Bn The Royal Welch Fusiliers and some from 6th/7th Bn The Royal Welch Fusiliers | . |
| . | B Company (South Wales Borderers) at Newport, successor to 2nd Bn The Monmouthshire Regt | . |
| . | C Company (Welch) at Pontypridd and Bridgend, successor to 4th Bn and 5th Bn The Welch Regt | . |
| 1969.01.01 | D Company (Royal Welch Fusiliers) formed at Caernarvon and Aberystwyth from 6th/7th (T) Bn The Royal Welch Fusiliers upon its reduction to cadre | . |
| 1970 | A Company formed platoon at Prestayn from 208 Battery 103 Regiment RA (V) | . |
| 1971.04.01 | Battalion disbanded and companies reorganised to form new battalions: | . |
| . | HQ Company, B Company and C Company redesignated as HQ Company, B Company and C Company 3rd (V) Battalion, The Royal Regiment of Wales respectively | . |
| . | A Company and D Company redesignated as A Company and D Company 3rd (V) Battalion, The Royal Welch Fusiliers | . |
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