2nd/11th Battalion, Ulster Defence Regiment
              < 2nd 
 
            
          
| 2nd/11th (County Armagh) Battalion, Ulster Defence Regiment | |
|---|---|
| Regimental Insignia | |
| Active | 1991–1992 | 
| Country | United Kingdom | 
| Branch | British Army | 
| Type | Infantry battalion | 
| Role | Internal Security | 
| Size | 750 | 
| Regimental Headquarters | Lisburn | 
| Motto(s) | "Quis Separabit" (Latin) "Who Shall Separate Us?" | 
| March | (Quick) Garryowen & Sprig of Shillelagh. (Slow) Oft in the Stilly Night | 
| Commanders | |
| Colonel Commandant | First: General Sir John Anderson GBE, KCB, DSO. Last: General Sir Charles Huxtable, KCB, CBE, DL | 
| Colonel of the Regiment | Colonel Sir Dennis Faulkner CBE | 
The 2nd//11th (County Armagh) Battalion, Ulster Defence Regiment was formed in 1991 as a result of an amalgamation between the 2nd Battalion Ulster Defence Regiment and the 11th Battalion Ulster Defence Regiment. The resultant 2/11 UDR was subsumed into the Royal Irish Rangers in 1992 as part of the Options for Change amalgamations and was renamed the 6th Battalion Royal Irish Regiment.