| 3rd Infantry Brigade | |
|---|---|
&sq=Qlik&lang=&file=File:3rd_Infantry_Brigade_Cloth_Badge.jpg){kind=icon} Badge of the 3rd Infantry Brigade. | |
| Active | 1809–1981 1988–2004 |
| Country |  United Kingdom |
| Branch |  British Army |
| Type | Infantry |
| Size | Brigade |
| Part of | HQ Northern Ireland |
| Garrison/HQ | Drumadd Barracks, Armagh |
| Engagements | Peninsular War Second Anglo-Afghan War First World War Second World War |
The 3rd Infantry Brigade was a Regular Army infantry brigade of the British Army, part of the 1st Infantry Division. Originally formed in 1809, during the Peninsular War, the brigade had a long history, seeing action in the Second Anglo-Afghan War, and during both the First and the Second World Wars.