The following units of the British Army were stationed in Ireland just before the start of the Great War. In addition to the units shown were the regimental depots of regiments based in Ireland.
Armagh
- Depot of the Royal Irish Fusiliers
Athlone
- 5th Reserve Brigade Royal Field Artillery
Ballincollig
- 24th Brigade Royal Field Artillery
Belfast
- Depot of the North Irish Horse [squadrons also at Londonderry, Enniskillen and Dundalk]
- Depot of the Royal Irish Rifles
- 1st Battalion, the Dorsetshire Regiment [in Victoria Barracks]
- 33rd Company of the Army Service Corps
- 15th Company of the Royal Army Medical Corps
- [See also Holywood]
Birr
- Depot of the Leinster Regiment (Royal Canadians)
Buttevant
- 1st Battalion, the North Staffordshire Regiment
Cahir
- 2nd Brigade Royal Field Artillery
Carlow
- 5th Signal Company of the Royal Engineers
Clonmel
- Depot of the Royal Irish Regiment
- 12th (Howitzer) Brigade Royal Field Artillery
Cork
- 10th Company Royal Garrison Artillery
- 43rd Company Royal Garrison Artillery
- 49th Company Royal Garrison Artillery
- 2nd Battalion, the Leinster Regiment
- 3rd Battalion, the Rifle Brigade
- 33rd Fortress Company of the Royal Engineers
- 38th Field Company of the Royal Engineers
- 17th Company of the Army Service Corps
- 16th Company of the Royal Army Medical Corps
Curragh Camp
- 4th Hussars
- 16th Lancers
- 2nd Battalion, the Suffolk Regiment
- 1st Battalion, the Duke of Cornwall’s Light Infantry
- 2nd Battalion, the Manchester Regiment
- 17th Field Company of the Royal Engineers
- 59th Field Company of the Royal Engineers
- 3rd Signal Troop of the Royal Engineers
- 4th Field Troop of the Royal Engineers
- 6th Company of the Army Service Corps
- 23rd Company of the Army Service Corps
- 37th Company of the Army Service Corps
- 49th (Mechanical Transport) Company of the Army Service Corps
- 51st (Mechanical Transport) Company of the Army Service Corps
- D Supply Company of the Army Service Corps
- 17th Company of the Royal Army Medical Corps
Dublin
- 5th (Royal Irish) Lancers [at Marlborough Barracks]
- Depot of the South Irish Horse [at Richmond Barracks]
- 2nd Battalion, the King’s Own Scottish Borderers [at Royal Barracks]
- 1st Battalion, the East Surrey Regiment [at Wellington Barracks]
- 2nd Battalion, the Duke of Wellington’s (West Riding Regiment) [at Portobello Barracks]
- 1st Battalion, the Queen’s Own (Royal West Kent Regiment) [at Richmond Barracks]
- 1st Battalion, the King’s Own Yorkshire Light Infantry [at Portobello Barracks]
- 14th Survey Company of the Royal Engineers
- K Signal Company of the Royal Engineers
- 4th Company of the Army Service Corps
- 19th Company of the Army Service Corps
- 48th (Mechanical Transport) Company of the Army Service Corps
- B and D Remounts Companies of the Army Service Corps
- 14th Company of the Royal Army Medical Corps
- 3rd Company of the Army Ordnance Corps (sections also at Haulbowline and Curragh Camp)
Dundalk
- 28th Brigade Royal Field Artillery
Fermoy
- 38th Brigade Royal Field Artillery
- 1st Battalion, the Buffs (East Kent Regiment)
- 1st Battalion, the Leicestershire Regiment
- 50th (Mechanical Transport) Company of the Army Service Corps
Galway
- Depot of the Connaught Rangers
Holywood
- 1st Battalion, the Norfolk Regiment
Kildare
- 8th (Howitzer) Brigade Royal Field Artillery
- 15th Brigade Royal Field Artillery
Kilworth
- 12th Field Company of the Royal Engineers
Kinsale
- 1st Battalion, the Royal Fusiliers (City of London Regiment)
Limerick
- 1st Battalion, the York & Lancaster Regiment
- B Signal Company of the Royal Engineers
- 6th Signal Company of the Royal Engineers
Londonderry
- 1st Battalion, the Cheshire Regiment
Lusk
- C Remounts Company of the Army Service Corps
Mullingar
- 1st Battalion, the Bedfordshire Regiment
Naas
- Depot of the Royal Dublin Fusiliers
Newbridge
- 3rd Brigade Royal Horse Artillery
- 27th Brigade Royal Field Artillery
Omagh
- Depot of the Royal Inniskilling Fusiliers
Tralee
- Depot of the Royal Munster Fusiliers
Almost all of these units, except for the depots, RGA Companies and 5th Reserve Brigade RFA, left for service in France during August 1914.
