The division comprised the following brigades: ;
26th Brigade • 8th (Service) Battalion,
Black Watch (Royal Highlanders) • 7th (Service) Battalion,
Seaforth Highlanders (
Ross-shire Buffs,
Duke of Albany's) • 8th (Service) Battalion,
Gordon Highlanders (
transferred to 15th (Scottish) Division 7 May 1916) • 5th (Service) Battalion,
Queen's Own Cameron Highlanders •
1/5th Battalion, Loyal North Lancashire Regiment,
Territorial Force (TF) (
joined December 1915 left January 1916) • 10th (Service) Battalion,
Argyll and Sutherland Highlanders (
transferred from 27th Brigade 6 May 1916, transferred to 32nd Division 17 February 1918) • 26th Machine Gun Company (
formed 29 January 1916 left to move into 9th Battalion Machine Gun Corps (M.G.C.) 1 March 1918) • 26th Trench Mortar Battery (
joined 15 June 1916) ;
27th Brigade • 11th (Service) Battalion,
Royal Scots (Lothian Regiment) • 12th (Service) Battalion, Royal Scots (Lothian Regiment) • 6th (Service) Battalion,
Royal Scots Fusiliers (
transferred to 15th (Scottish) Division 7 May 1916) • 10th (Service) Battalion, Argyll and Sutherland Highlanders (
transferred to 26th Brigade 7 May 1916) • 6th (Service) Battalion,
King's Own Scottish Borderers (
transferred from 28th Brigade 6 May 1916) • 9th (Service) Battalion,
Cameronians (Scottish Rifles) (
transferred from 28th Brigade 6 May 1916, transferred to the 14th (Light) Division in February 1918) • 27th Machine Gun Company (
formed 23 December 1915, left to move into 9th Battalion M.G. C. 1 March 1918) • 27th Trench Mortar Battery (
joined July 1916) ;
28th Brigade (
The 28th Brigade was broken up in May 1916 and replaced with the 1st South African Brigade. It reformed in September 1918) • 6th (Service) Battalion, King's Own Scottish Borderers (
transferred to 27th Brigade 6 May 1916) • 9th (Service) Battalion, Cameronians (Scottish Rifles) (
transferred to 27th Brigade 6 May 1916, returned September 1918) • 10th (Service) Battalion,
Highland Light Infantry (
transferred to South African Brigade 6 May 1916) • 11th (Service) Battalion, Highland Light Infantry (
transferred to South African Brigade 6 May 1916) • 2nd Battalion, Royal Scots Fusiliers (
transferred from South African Brigade 13 September 1918) • 1st Battalion,
Royal Newfoundland Regiment (
joined September 1918) • 28th Machine Gun Company (
formed 3 January 1916 transferred to South African Brigade 6 May 1916) • 28th Trench Mortar Battery(
joined 11 September 1918) ;
1st South African Brigade (
Replaced the 28th Brigade in May 1916 and was replaced in turn by a reformed 28th Brigade on 13 September 1918) • 1st Regiment, South African Infantry (
merged with 2nd and 4th Battalions on 24 April 1918 as the South African (Composite) Regiment, regained separate identity on 1 September 1918) • 2nd Regiment, South African Infantry (
merged with 1st Battalion, reformed 1 September 1918) • 3rd Regiment, South African Infantry (
disbanded 18 February 1918) • 4th Regiment, South African Infantry (
merged with 1st Battalion, reformed 1 September 1918) • 10th (Service) Battalion,
Highland Light Infantry (
transferred from 28th Brigade 6 May 1916, merged with 11th Battalion on 14 May 1916 forming 10/11th Battalion and transferred to 15th (Scottish) Division) • 11th (Service) Battalion, Highland Light Infantry (
transferred from 28th Brigade 6 May 1916 merged with 10th Battalion) • 3/4th Battalion,
Royal West Kent Regiment, TF (
joined 6 June 1917, left 15 June 1917) •
3/10th Battalion, Middlesex Regiment, TF (
joined 6 June 1917, left 23 July 1917) • 2nd Battalion, Royal Scots Fusiliers (
joined 26 April 1918, transferred to 28th Brigade 13 September 1918) • 9th (Service) Battalion, Cameronians (Scottish Rifles) (
joined 21 April 1918, transferred to 28th Brigade 12 September 1918) • 28th Machine Gun Company (
transferred from 28th Brigade 6 May 1916 left to move into 9th Battalion M.G.C. 1 March 1918) • South African Trench Mortar Battery (
joined 13 June 1916)
Divisional Troops • 6th (Service) Battalion,
Bedfordshire Regiment (
left March 1915) • 6th (Service) Battalion,
Leicestershire Regiment (
left April 1915) • 9th (Service) Battalion, Seaforth Highlanders (
joined December 1914, became Divisional Pioneer Battalion early 1915) • 10th Motor Machine Gun Battery (
joined 30 April 1915, left 11 June 1916) • 197th Company, M.G.C. (
joined 19 December 1916, left to move into 9th Battalion M.G.C. 1 March 1918) • 9th Battalion, M.G.C. (
formed 1 March 1918 absorbing the brigade MG companies) • 11th Motor Machine Gun Battery (
joined 7 October 1918, left 7 November 1918) • Divisional Mounted Troops • B Squadron,
1/1st Glasgow Yeomanry (
joined 15 May 1915, left 10 May 1916) • 9th Divisional Cyclist Company,
Army Cyclist Corps (
formed 1 December 1914, left 26 June 1916) • 9th Divisional Train
Army Service Corps • 104th, 105th, 106th and 107th Companies • 21st Mobile Veterinary Section
Army Veterinary Corps • 212th Divisional Employment Company (
formed by 23 June 1917)
Royal Artillery • L Brigade,
Royal Field Artillery (R.F.A.) • LI Brigade, R.F.A. • LII Brigade, R.F.A. (
left 8 January 1917) • LIII (Howitzer) Brigade, R.F.A. (
broken up 11 September 1916) • 9th Divisional Ammunition Column R.F.A. •
9th Heavy Battery, Royal Garrison Artillery (
left 16 May 1915) • V.9 Heavy Trench Mortar Battery R.F.A. (
joined May 1916, left February 1918) • X.9, Y.9 and Z.9 Medium Mortar Batteries R.F.A. (
joined April 1916; on 13 February 1918, Z broken up and distributed among X and Y batteries)
Royal Engineers • 63rd Field Company • 64th Field Company • 90th Field Company (
joined January 1915) • 9th Divisional Signals Company
Royal Army Medical Corps • 27th Field Ambulance • 28th Field Ambulance • 29th Field Ambulance (
left May 1916) • South African Field Ambulance (
joined May 1916, left 13 September 1918) • 2/1st (East Lancashire) Field Ambulance (
joined 26 September 1918) • 20th Sanitary Section (
left 29 March 1917) ==General Officers Commanding==