1st Battalion
August 1914 : in Shorncliffe. Part of 10th Brigade, 4th Division. 3 August 1917 : transferred to 36th (Ulster) Division. 24 August 1917 : transferred to 107th Brigade, 36th (Ulster) Division. 8 February 1918 : transferred to 108th Brigade, 36th (Ulster) Division.
2nd Battalion
August 1914 : in Quetta Division in India. returned to UK, arriving Winchester on 20 November 1914. November 1914 : attached to 82nd Brigade, 27th Division. 2 November 1916 : transferred to 31st Brigade, 10th (Irish) Division.
3rd (Reserve) Battalion
August 1914 : in Armagh. Remained in Ireland until April 1918, then moved to England, where it absorbed the 4th Bn.
4th (Extra Reserve) Battalion
August 1914 : in Cavan. Remained in Ireland until April 1918, then moved to England, where it was absorbed by the 3rd Bn.
Territorial
The Irish regiments formed no TF battalions.
New Armies
5th (Service) Battalion
Formed at Armagh, August 1914, as part of K1. August 1914 : attached to 31st Brigade, 10th (Irish) Division. 2 November 1916 : absorbed the 6th Bn. 30 April 1918 : left the Division and moved to France, arriving Marseilles on 27 May 1918. 23 July 1918 : attached to 66th Division. 24 August 1918 : transferred to 48th Brigade, 16th (Irish) Division, absorbing 11th Bn.
6th (Service) Battalion
Formed at Armagh, August 1914, as part of K1. August 1914 : attached to 31st Brigade, 10th (Irish) Division. 2 November 1916 : absorbed by the 5th Bn.
7th (Service) Battalion
Formed at Armagh, September 1914, as part of K2. September 1914 : attached to 49th Brigade, 16th (Irish) Division. 15 October 1916 : amalgamated with 8th Bn to form 7/8th Bn. 10 February 1918 : disbanded in France.
8th (Service) Battalion
Formed at Armagh, September 1914, as part of K2. September 1914 : attached to 49th Brigade, 16th (Irish) Division. 15 October 1916 : amalgamated with 8th Bn to form 7/8th Bn.
9th (Service) Battalion
Formed in Belfast in September 1914, from the Armagh, Monaghan and Cavan Volunteers, units of the paramilitary Ulster Volunteer Force. September 1914 : attached to 108th Brigade, 36th (Ulster) Division. 25 September 1917 : absorbed two squadrons of the North Irish Horse, and renamed 9th (North Irish Horse) Bn.
10th (Reserve) Battalion
Formed in Lurgan in September 1915. Remained in Ireland until April 1918, then moved to England, where it was absorbed by the 3rd Bn.
Other units
11th (Service) Battalion
Formed in Greatham (West Hartlepool) on 1 June 1918. On 18 June, it absorbed the cadre of the 7th Bn, the Royal Dublin Fusiliers. 28 June 1918 : attached to 48th Brigade, 16th (Irish) Division. 29 August 1918 : absorbed by the 5th Bn.
1st Garrison Battalion
Formed in Dublin in September 1915. Moved to India in February 1916, and to Burma in May 1917, where it then remained.
2nd Garrison Battalion
Formed at Dublin in April 1916. Remained in Ireland until moving to Salonika in August 1916. 1 March 1917 - 6 August 1917 : attached to 228th Brigade, 28th Division.
3rd (Reserve) Garrison Battalion
Formed in Dublin in December 1915. Remained in Ireland and England throughout the war.
"The Faugh-a-Ballaghs".
