1st Battalion, The Royal Irish Regiment (27th (Inniskilling) 83rd and 87th and The Ulster Defence Regiment
| Dates | Locations | Higher Formation | Remarks |
| | | |
| 1992.07.01 | Formed by renaming 1st Battalion, The Royal Irish Rangers (27th (Inniskilling) 83rd and 87th) | | |
| 1992.07 | Cyprus: Salamanca Barracks, Episkopi | | |
| 1993? | UK? | | |
| | Aug 93: disbanded and concurrently re-formed by renumbering 2nd Battalion | | |
| 1993 | UK? | | |
| 1995.01 | England: Alma Barracks, Catterick | 19 Mechanised Brigade | |
| Feb - Jun 96: Northern Ireland: Rural Roulement Battalion | | |
| Feb - Oct 97: Bosnia | | |
| 1998? D (Gurkha) Coy attached ("Gurkha Reinforcement Company") | | |
| Dec 88 - ?? 99: Macedonia?? | | |
| | Jun - Sep 99: Kosovo 'Operation AGRICOLA | | |
| 1999.12 | England: Howe Barracks, Canterbury | 16 Air Assault Brigade | |
| 22 Jul 00 - 00??: Sierra Leone | IMATT | |
| Jun 01 - Dec 01: Northern Ireland | | |
| Feb 03 - Mar 03: Persian Gulf | 16 Air Assault Brigade | |
| Mar 03 - May 03: Iraq (Op Telic 1) | 16 Air Assault Brigade | |
| | Jul 03: D (Gurkha) Coy disbanded | | |
| 2003.09 | Scotland: Fort George | MND(SE) | |
| Sep 03 - 1 Sep 04: Northern Ireland: Province Reinforcement Bn | | |
| | Jul 05 - Jan 06: Iraq: Shibah | | |
| 2007.07 | England: Clive Barracks, Tern Hill | 16 Air Assault Brigade | |
| Apr 08 - Oct 08: Afghanistan: Helmand Province: (Op Herrick 8) | 16 Air Assault Brigade | |
| | | |
2nd Battalion, The Royal Irish Regiment (27th (Inniskilling) 83rd and 87th and The Ulster Defence Regiment
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