• Training Centre
• Recon Company
• Telecom Company
• MP Company
• Pioneer Company
• Logistics Battalion
• Artillery Regiment
• Infantry Battalion
• Infantry Battalion
• Infantry Battalion

1 Southern Brigade is an all arms Brigade consisting of combat, combat support and combat service support elements. Such elements include units of Infantry, Artillery, Cavalry, Engineers, Communications and Transport. These units are spread throughout the Brigades' designated area of territorial responsibility.

The Southern Brigade was responsible for military operations in the south of the country. Its area of responsibility included the counties of: Carlow, Clare, Cork, Kilkenny, Kerry, Laois, Limerick, Tipperary, Wexford and Waterford. HQ of the 1st Southern Brigade (Bde) was located in Collins Barracks, Cork. The other Barracks located in the Southern Bde area of responsibility (AOR) includee Sarsfield Barracks in Limerick, Kickham Barracks in Clonmel, Stephens Barracks in Kilkenny and Kilworth Training Camp in Kilworth.

Within the Southern Brigades area of responsibility are situated various vital installations including: Shannon Airport; Cork Airport; Cork Docks; and Farranfore Airport. The Brigade has at times assisted the civil powers by providing security at these locations when requested. There are several training areas within the Brigade area: Kilworth Camp; Bere island; and Fort Davis.

• Training Centre
• Recon Company
• Telecom Company
• MP Company
• Pioneer Company
• Logistics Battalion
• Artillery Regiment
• Infantry Battalion
• Infantry Battalion
• Infantry Battalion

2 Eastern Brigade is an all arms Brigade consisting of combat, combat support and combat service support elements. Such elements include units of Infantry, Artillery Cavalry, Engineers, Communications and Transport. These units are spread throughout the Brigades' designated area of territorial responsibility.

The Eastern Brigade was responsible for military operations in the East of the country. Its area of responsibility included the counties of: Dublin, Kildare, Louth, Meath, Wicklow. HQ of the 2nd Eastern Bde was located in Cathal Brugha Barracks in Rathmines, Dublin 6. Other Barracks located within the Eastern Bde AOR included McKee Barracks on Blackhorse Avenue, Dublin 7, Gormanstown Camp in Co Meath, Aiken Barracks in Dundalk and St Bricins Military Hospital in Dublin 7.

Within the Eastern Brigades area of responsibility are situated various vital installations including: Government buildings; Uachtarán na hÉireann (Residence of the President); Foreign Embassies; Dublin airport; and Dublin Docks. The Brigade has at times assisted the civil powers by providing security at these locations when requested. There are several training areas within the Brigade area: Gormanston Camp; Kilbride Camp; and Glen of Imaal.

• Training Centre
• Recon Company
• Telecom Company
• MP Company
• Pioneer Company
• Logistics Battalion
• Artillery Regiment
• Infantry Battalion
• Infantry Battalion
• Infantry Battalion

4 Western Brigade was an all arms Brigade consisting of combat, combat support and combat service support elements. Such elements include units of Infantry, Artillery, Cavalry, Engineers, Communications and Transport. These units were spread throughout the Brigade's designated area of territorial responsibility.

The Western Brigade was responsible for military operations in the West of the country. Its area of responsibility included the counties of: Cavan, Donegal, Galway, Leitrim, Longford, Offaly, Roscommon, Sligo and Westmeath. HQ of the 4th Western Bde was located in Custume Barracks, Athlone. Other Barracks located in the Western Bde AOR included Columb Barracks, Mullingar, Finner Camp in Ballyshannon, Co Donegal, Dún Uí Mhaoilíosa in Renmore, Galway and Dún Uí Neill in Cavan.

The Defence Forces Training Centre (DFTC) was located in The Curragh Camp in Co Kildare. The DFTC consisted of a HQ element, The Military College, The Combat Support College, The Combat Service Support College, The Logistics Base Curragh and The DFTC Supply and Services Unit. The following DF Reserve Units were also located in the DFTC, B Company, 3rd Infantry Battalion, Army Ranger Wing (ARW) 1st Armoured Car Squadron and the Air Defence Regiment (ADR).