Royal Welsh
| Dates | Locations | Higher Formation/Remarks |
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| . | 1st Battalion The Royal Welsh (The Royal Welch Fusiliers) | . |
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| 2006.03.01 | Formed by renaming 1st Battalion The Royal Welch Fusiliers | . |
| 2006.03 | England: Mons Barracks, Aldershot | . |
| 2006.04 | Cyprus: Salamanca Barracks, Episkopi | . |
| . | May - Nov 07: Iraq (Op Telic 10 - 1 Company only) | 1 Mechanised Brigade |
| . | Oct 07 - Apr 08: Kabul, Afghanistan | Afghan Roulement Inf Bn |
| 2008 | England: The Dale Barracks, Chester | Armoured Infantry role |
| . | 4 Dec 09 - 4 May 10: Afghanistan: Helmand Province: (Op Herrick 11) | 11 Light Brigade |
| . | Apr - Oct 12: Afghanistan (Op Herrick 16) | 12 Mechanised Brigade |
| . | 1 April 2014: Battalion merged with 2nd Battalion as 1st Battalion at Lucknow Barracks, Tidworth: Armoured Infantry role | . |
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| . | 2nd Battalion The Royal Welsh (The Royal Regiment of Wales) | . |
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| 2006.03.01 | Formed by renaming 1st Battalion The Royal Regiment of Wales | . |
| 2006.03 | England: Lucknow Barracks, Tidworth: Armoured Infantry role | 12 Brigade |
| . | May - Nov 07: Iraq: Basra (Op Telic 10) | 1 Mechanised Bde |
| . | Apr 09 - Oct 09: Afghanistan: (Op Herrick 10) C Company Group only | . |
| . | 4 Dec 09 - 4 May 10: Afghanistan: Helmand Province: (Op Herrick 11) A Company only | . |
| . | Oct 10 - Apr 11: Afghanistan (Op Herrick 13) B (Rorke's Drift) Company only | . |
| . | 1 April 2014: 2nd Battalion merged with 1st Battalion as 1st Battalion at Lucknow Barracks, Tidworth in Armoured Infantry role | . |
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