This is a list of brigades of the Irish Republican Army, formed or active between 1916 and 1922, which were involved in activities undertaken by the Irish Republican Army.
| Period | Brigade | Division | Commandant |
|---|---|---|---|
| 1916–1917 | East Clare Brigade | Michael Brennan | |
| 1916–1917 | Mid Clare Brigade | Sean McNamara | |
| 1916–1917 | North Clare Brigade | H. J. Hunt | |
| 1916–1917 | West Clare Brigade | E. Fennell | |
| 1917–1918 | Clare Brigade | Patrick Brennan | |
| 1918–1922 | East Clare Brigade | 1st Western Division | Michael Brennan |
| 1918–1922 | Mid Clare Brigade | 1st Western | Frank Barrett |
| 1918–1922 | West Clare Brigade | 1st Western | Art O'Donnell |
| Period [1] [2] [3] [4] | Brigade | Division | Commandant |
|---|---|---|---|
| 1914-1919 | Cork Volunteers | 1st Southern Division | Tomás Mac Curtain |
| 1919-1920 | 1st Cork Brigade | 1st Southern Division | Tomás Mac Curtain [5] |
| 1920 | 1st Cork Brigade | 1st Southern Division | Terence MacSwiney |
| 1920-1922 | 1st Cork Brigade | 1st Southern Division | Sean O'Hegarty |
| 1922-? | 1st Cork Brigade | 1st Southern Division | Herbert ‘Sean’ Mitchell |
| 1919-1921 | 2nd Cork Brigade (North Cork Brigade) | 1st Southern Division | Liam Lynch [6] |
| 1921 | 2nd Cork Brigade (North Cork Brigade) | 1st Southern Division | Sean Moylan |
| 1921 | 2nd Cork Brigade (North Cork Brigade) | 1st Southern Division | George Power |
| 1919-1920 | 3rd Cork Brigade (West Cork Brigade) | 1st Southern Division | Tom Hales |
| 1920-1921 | 3rd Cork Brigade (West Cork Brigade) | 1st Southern Division | Charlie Hurley |
| 1921-22 | 3rd Cork Brigade (West Cork Brigade) | 1st Southern Division | Tom Barry |
| 1921 | 4th Cork Brigade | 1st Southern Division | Paddy O'Brien [7] [8] |
| 1921-1922 | 4th Cork Brigade | 1st Southern Division | Sean Moylan [9] |
| 1921-1922 | 5th Cork Brigade | 1st Southern Division | Gibbs Ross [10] [11] |
| Period | Brigade | Division | Commandant |
|---|---|---|---|
| 1914-1917 | Kerry Brigade | 1st Southern Division | Austin Stack |
| 1917-1919 | 1st Kerry Brigade | 1st Southern Division | Austin Stack |
| 1919–1921 | 1st Kerry Brigade | 1st Southern Division | Patrick Cahill |
| 1921 | 1st Kerry Brigade | 1st Southern Division | Andrew Cooney |
| 1921-1922 | 1st Kerry Brigade | 1st Southern Division | Humphrey Murphy [12] |
| -1921 | 2nd Kerry Brigade | 1st Southern Division | Dan Mahony |
| 1921 | 2nd Kerry Brigade | 1st Southern Division | Humphrey Murphy |
| 1922 | 2nd Kerry Brigade | 1st Southern Division | John Joe Rice [13] |
| Period | Brigade | Division | Commandant |
|---|---|---|---|
| 1918-1922 | 3rd Tipperary Brigade | 2nd southern division [14] | Séumas Robinson |
| | This section needs expansion. You can help by adding to it. (July 2024) |
| Period | Brigade | Division | Commandant |
|---|---|---|---|
| 1919-1922 | Longford Brigade | 1st Midlands Division | Thomas Reddington [15] |
| Period | Brigade | Division | Commandant |
|---|---|---|---|
| 1920-1922 | Offaly Brigade | 1st Eastern Division | Barry Byrne[ citation needed ] |
| Period | Brigade | Division | Commandant |
|---|---|---|---|
| 1916–1922 | Belfast Brigade | 3rd Northern | Sean Cusack & Joe McKelvey |
| Period | Brigade | Division | Commandant |
|---|---|---|---|
| 1916–1921 | Cavan Brigade | Ulster | Pat Woods |
| 1921–1922 | East Cavan Brigade | 5th Northern | Peadar McMahon, Seán Gallagher & Séamus McGovern |
| 1921–1922 | West Cavan Brigade | 6th Northern | Éamonn McGovern, Michael MacManus & Seán Dolan |
| Period | Brigade | Division | Commandant |
|---|---|---|---|
| –1922 | West Donegal Brigade | 1st Northern Division | |
| –1922 | North East Donegal Brigade | 1st Northern | |
| –1922 | South West Donegal Brigade | 1st Northern | |
| –1922 | South East Donegal Brigade | 1st Northern | |
No.1 Batt. Enniskillen A. Boho B. Derrygonnelly C. Enniskillen D. Monea E. Rosinuremore
No.2 Batt. Belcoo A. Belcoo B. Doobally C. Glan Lower D. Glan Upper E. Killinagh F. Mullaghdun
| Period | Brigade | Division | Commandant |
|---|---|---|---|
| 1916–1922 | Monaghan Brigade | 5th Northern Division | Eoin O'Duffy |
| Period | Brigade | Division | Commandant |
|---|---|---|---|
| 1916–1920 | Galway Brigade | ||
| 1920–1922 | South East Galway Brigade | 1st Western | Joeseph Stanford |
| 1920–1922 | North Galway Brigade | 2nd Western Division | |
| 1920–1922 | West Galway Brigade | 4th Western Division | Peter Joe McDonnell |
| Period | Brigade | Division | Commandant |
|---|---|---|---|
| 1 West Mayo Brigade | 4th Western Division | Ned Mohan | |
| 2 North Mayo Brigade | 4th Western Division | C. Mackin; Séamus Kilcullen | |
| 1922- | 5 North West Mayo | 4th Western Division | Anthony Farrell |
| East Mayo | 3rd Western Division | ||
| Period | Brigade | Division | Commandant |
|---|---|---|---|
| 1st Scottish Brigade | 1st Scottish | ||
| 2nd Scottish Brigade | 1st Scottish | ||
| Liverpool Battalion | |||
| London Battalion | |||
| Newcastle-on-Tyne Battalion | |||
| Q Company GHQ | |||
{{cite web}}: CS1 maint: archived copy as title (link)