List of brigades of the Irish Republican Army

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.

Munster

County Clare

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

County Cork

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]

County Kerry

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]

County Limerick

County Tipperary

Period	Brigade	Division	Commandant
1918-1922	3rd Tipperary Brigade	2nd southern division[14]	Séumas Robinson

County Waterford

Leinster

County Carlow

County Dublin

County Kildare

County Kilkenny

County Laois

County Longford

See also: North Longford Flying Column

Period	Brigade	Division	Commandant
1919-1922	Longford Brigade	1st Midlands Division	Thomas Reddington[15]

County Louth

See also: Fourth Northern Division of the Irish Republican Army

County Offaly

Period	Brigade	Division	Commandant
1920-1922	Offaly Brigade	1st Eastern Division	Barry Byrne[citation needed]

County Westmeath

County Wexford

County Wicklow

Ulster

County Antrim

Period	Brigade	Division	Commandant
1916–1922	Belfast Brigade	3rd Northern	Sean Cusack & Joe McKelvey

County Armagh

County Cavan

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

County Donegal

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

County Down

County Fermanagh

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

County Londonderry

County Monaghan

Period	Brigade	Division	Commandant
1916–1922	Monaghan Brigade	5th Northern Division	Eoin O'Duffy

County Tyrone

Connacht

County Galway

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

County Leitrim

County Mayo

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

^[16]

County Roscommon

County Sligo

Other

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

Bibliography

• Hopkinson, Michael (2002). The Irish War of Independence: The Definitive Account of the Anglo Irish War of 1919-1921. Gill & Macmillan Ltd. ISBN 0-7171-6197-8.
• McKenna, Joseph (2011). Guerrilla Warfare in the Irish War of Independence, 1919-1921. McFarland. ISBN 978-0-7864-8519-2.