Sadsack's blog: "Other Irish regiments that fought in the Somme"

1st Battalion August 1914 : in Aden. Returned to UK and landed at Liverpool on 22 October 1914. October 1914 : attached to 25th Brigade, 8th Division. 3 February 1918 : transferred to 107th Brigade, 36th (Ulster) Division. 2nd Battalion August 1914 : in Tidworth. Part of 7th Brigade, 3rd Division. 8 October 1915 : transferred with Brigade to 25th Division. 26 October 1915 : transferred to 74th Brigade, 25th Division. 13 November 1917 : transferred to 108th Brigade, 36th (Ulster) Division, absorbing 7th Battalion. 8 February 1918 : transferred to 107th Brigade, 36th (Ulster) Division. 3rd (Reserve), 4th (Extra Reserve) and 5th (Extra Reserve) Battalions August 1914 : in Belfast, Newtownards and Downpatrick respectively. Remained in Ireland until April 1918, then moved to England. Territorial Force The Irish regiments did not form TF battalions. New Armies 6th (Service) Battalion Formed in Dublin, August 1914, as part of K1. Became part of 29th Brigade, 10th (Irish) Division. 5 May 1918 : disbanded in Egypt. 7th (Service) Battalion Formed in Belfast in September 1914, as part of K2. Became part of 48th Brigade, 16th (Irish) Division. 5 March 1915 : joined by one Company from the Royal Jersey Militia. 23 August 1917 : transferred to 49th Brigade, 16th (Irish) Division. 14 October 1917 : transferred to 108th Brigade, 36th (Ulster) Division. 14 November 1917 : absorbed by 2nd Bn. The 8th to 16th (Service) Bns were formed from the paramilitary Ulster Volunteer Force. 8th (Service) Battalion (East Belfast) Formed in Belfast in September 1914, from the Belfast Volunteers. Became part of 107th Brigade, 36th (Ulster) Division. 29 August 1917 : amalgamated with 9th Bn, to form 8/9th Bn. 7 February 1918 : disbanded in France. 9th (Service) Battalion (West Belfast) Formed in Belfast in September 1914, from the Belfast Volunteers. Became part of 107th Brigade, 36th (Ulster) Division. 29 August 1917 : amalgamated with 8th Bn, to form 8/9th Bn. 10th (Service) Battalion (South Belfast) Formed in Belfast in September 1914, from the Belfast Volunteers. Became part of 107th Brigade, 36th (Ulster) Division. 20 February 1918 : disbanded in France. 11th (Service) Battalion (South Antrim) Formed in County Antrim in September 1914, from the Antrim Volunteers. Became part of 108th Brigade, 36th (Ulster) Division. 29 August 1917 : amalgamated with 13th Bn, to form 11/13th Battalion. 18 February 1918 : disbanded in France. 12th (Service) Battalion (Central Antrim) Formed in County Antrim in September 1914, from the Antrim Volunteers. Became part of 108th Brigade, 36th (Ulster) Division. 13th (Service) Battalion (County Down) Formed in County Down in September 1914, from the Down Volunteers. Became part of 108th Brigade, 36th (Ulster) Division. 29 August 1917 : amalgamated with 11th Bn. 14th (Service) Battalion (Young Citizens) Formed in Belfast in September 1914, from the Belfast Volunteers. Became part of 109th Brigade, 36th (Ulster) Division. 18 February 1918 : disbanded in France. 15th (Service) Battalion (North Belfast) Formed in Belfast in September 1914, from the Belfast Volunteers. Became part of 107th Brigade, 36th (Ulster) Division. 16th (Service) Battalion (2nd County Down) (Pioneers) Formed in Lurgan in September 1914, from the Down Volunteers. January 1915 : became Pioneer Bn to 36th (Ulster) Division. 29 August 1917 : amalgamated with 11th Bn. 17th to 20th (Reserve) Battalions Formed in Newcastle (17th and 19th) and Holywood (18th and 20th) in March, April, October and November 1915 respectively. All remained in Ireland, in 15th (Ulster) Reserve Brigade, until April 1918 when the Brigade moved to England and all Bns were absorbed into 3rd Bn. Other Battalions 1st Garrison Battalion Formed in Dublin in November 1915. Moved to India in February 1916, where it then remained

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".

1st Battalion August 1914 : in Trimulgherrey, India. Returned to UK and landed at Avonmouth on 10 January 1915. 10 January 1915 : attached to 87th Brigade, 29th Division. 5 February 1918 : transferred to 109th Brigade, 36th Division. 2nd Battalion August 1914 : in Dover. Part of 12th Brigade, 4th Division. 6 December 1914 : transferred as GHQ Troops. 26 January 1915 : transferred to 5th Brigade, 2nd Division. 22 July 1915: transferred as Army Troops to Third Army. 8 November 1915 : transferred to 14th Brigade, 5th Division. 24 December 1915 : transferred to 96th Brigade, 32nd Division. 3 February 1918 : transferred to 109th Brigade, 36th Division. 3rd (Reserve) Battalion August 1914 : in Omagh. Remained in Ireland until April 1918, then moved to England. 4th (Extra Reserve) Battalion August 1914 : in Enniskillen. Remained in Ireland and England throughout the war. Territorial Force The Irish Regiments did not form battalions for the TF. New Armies 5th (Service) Battalion Formed at Omagh, August 1914, as part of K1. Became part of 31st Brigade, 10th (Irish) Division. 28 May 1918 : left the Division and moved to France. 19 July 1918 : transferred to 198th Brigade, 66th Division. 6th (Service) Battalion Formed at Omagh, August 1914, as part of K1. Became part of 31st Brigade, 10th (Irish) Division. 2 May 1918 : left the Division and moved to France. 7 June 1918 : transferred to 43rd Brigade, 14th Division. 18 June 1918 : transferred to 103rd Brigade, 34th Division. 29 June 1918 : transferred to Lines of Communication. 16 July 1918 : transferred to 151st Brigade, 50th Division. 7th (Service) Battalion Formed at Omagh, October 1914, as part of K2. Became part of 49th Brigade, 16th (Irish) Division. 23 August 1917 : amalgamated with 8th Bn to become 7/8th Bn. 22 April 1918 : reduced to cadre strength. 17 June 1918 : transferred to 102nd Brigade, 34th Division. 26 June 1918 : transferred to GHQ Troops, and re-established with men from 8th Rifle Brigade. 3 July 1918 : transferred to 89th Brigade, 30th Division. 8th (Service) Battalion Formed at Omagh, October 1914, as part of K2. Became part of 49th Brigade, 16th (Irish) Division. 23 August 1917 : amalgamated with 7th Bn to become 7/8th Bn. The following New Army battalions of this regiment were formed in 1914 from existing units of the Ulster Volunteer Force. 9th (Service) Battalion (County Tyrone) Formed at Omagh, September 1914, from the Tyrone Volunteers (included two companies of Volunteers who had already joined the 5th and 6th Bns.). Became attached to 3rd Brigade, Ulster Division. 2 November 1914 : formation renamed 109th Brigade, 36th Division. 10th (Service) Battalion (Derry) Formed at Omagh, September 1914, from the Derry Volunteers. Became attached to 3rd Brigade, Ulster Division. 2 November 1914 : formation renamed 109th Brigade, 36th Division. 21 January 1918 : disbanded in France. 11th (Service) Battalion (Donegal and Fermanagh) Formed at Omagh, September 1914, from the Donegal and Fermanagh Volunteers. Became attached to 3rd Brigade, Ulster Division. 2 November 1914 : formation renamed 109th Brigade, 36th Division. 21 January 1918 : disbanded in France. 12th (Reserve) Battalion Formed in Enniskillen in April 1915 as a local Reserve Bn. Remained in Ireland until moving to England when absorbed by 3rd Bn in April 1918. Other Battalions 13th (Service) Battalion 11 June 1918 : the 11th Garrison Guard Bn in France became the 13th (Garrison) Bn. Attached to 119th Brigade, 40th Division. 13 July 1918 : renamed 13th (Service) Bn.