This K3 Division began to assemble in the area of Eastbourne and Seaford, with the artillery at Lewes, from September 1914. It remained in these areas, other than when the infantry moved for two weeks entrenchment training to Maidstone in April 1915, as it was trained and equipped.

The Division crossed to France in early September 1915, all units being concentrated near Flesselles by 9th of the month. It's stay in France was to be very short.

On 27 October 1915, the Division, having been moved by train to Marseilles, began to embark for Salonika. It completed concentration there in November, althoug the final artillery units were still coming in as late as 13 December 1915. It remained in the theatre for the rest of the war, taking part in the following operations:

8-13 December 1915: the Retreat from Serbia (Advanced Divisional HQ, 6th Brigade, 9th Border and 68th Field Ambulance only)

10-18 August 1916: the battle of Horseshoe Hill

13-14 September 1916: the battle of Machukovo

24-25 April and 8-9 May 1917: the battle of Doiran

18-19 September 1918: the battle of Doiran

An armistice with Bulgaria was signed on 30 September 1918. By 18-20 October, units of the Division had marched back to Stavros. Here they embarked on destroyers with the intention of a landing at Dede Agach. After one attempt was called off due to rough weather, the infantry finally landed on 28 October 1918. On reaching Makri, the Division learned that an armistice with Turkley was imminent.

Demobilisation began at Chugunsi, and the Division ceased to exsit by 31 March 1919.

It had suffered casualties of 7,728 killed, wounded and missing.

65th Brigade

9th (Service) Bn , the King's Own (joined October 1914)

14th (Service) Bn, the King's (Liverpool) (joined October 1914, left 11 June 1918)

12th (Service) Bn , the Lancashire Fusiliers (joined September 1914, left 2 July 1918)

9th (Service) Bn, the East Lancashire (joined September 1914)

8th (Service) Bn, the South Wales Borderers (joined from 67th Brigade June 1918)

65th Machine Gun Company MGC (joined 14 July 1916)

65th Trench Mortar Battery (joined 3 November 1916)

65th SAA Section Ammunition Column (joined by 17 July 1916)

66th Brigade

9th (Service) Bn, the Border (joined September 1914, became Divisional Troops (pioneer battalion) in February 1915)

9th (Service) Bn, the South Lancashire (joined September 1914)

8th (Service) Bn, the KSLI (joined September 1914)

13th (Service) Bn, the Manchesters (joined October 1914, left 28 June 1918)

12th (Service) Bn, the Cheshires (joined February 1915)

66th Machine Gun Company MGC (joined 14 July 1916)

66th Trench Mortar Battery (joined 5 November 1916)

66th SAA Section Ammunition Column (joined by 17 July 1916)

67th Brigade

11th (Service) Bn, the Royal Welsh Fusiliers (joined September 1914)

7th (Service) Bn, the South Wales Borderers (joined September 1914)

8th (Service) Bn, the South Wales Borderers (joined September 1914, left for 65th Brigade, 30 June 1918)

11th (Service) Bn, the Welsh (joined September 1914)

67th Machine Gun Company MGC (joined 14 July 1916)

67th Trench Mortar Battery (joined 4 November 1916)

67th SAA Section Ammunition Column (joined by 17 July 1916)

---

Divisional Infantry Troops

12th (Service) Bn, the Cheshires (joined September 1914, left February 1915)

10th (Service) Bn, the Loyal North Lancs (joined October 1914, left April 1915)

9th (Service) Bn, the North Staffords (joined September 1914, left April 1915)

10th (Service) Bn, the Hampshires (joined January 1919, left February 1919)

2nd Bn, the QVO Rajput Light Infantry (joined January 1919, left February 1919)

1/10th Bn, Jats (joined and left January 1919)

95th Bn, Russell's Infantry (joined January 1919, left February 1919)

---

Mounted Troops

D Squadron, the 1/1st Lothians and Border Horse Yeomanry (joined July 1915, left for 8th Mounted Brigade 29 November 1916)

22nd Divisional Cyclist Company (formed February 1915, left for XII Corps November 1916)

---

Divisional Artillery

XCVIII Brigade, RFA (joined September 1914)

XCIX Brigade, RFA (joined September 1914)

C Brigade, RFA (joined September 1914)

CI Brigade, RFA (joined September 1914)

22nd Heavy Battery RGA (raised in Woolwich in August 1914 for the Division but left and moved independently to France on 31 August 1915, joining XXII HA Brigade)

22nd Divisional Ammunition Column (formed September 1915, transferred to become A Section of XII Corps Ammunition Column, January 1915. 22nd Division retained the Brigade Ammunition Columns)

---

Engineer Units

87th Field Company (joined Sep 1914, left for 12th Division February 1915)

88th Field Company (joined Sep 1914, left for 12th Division February 1915)

99th Field Company (joined from 31st Division, February 1915)

100th Field Company (joined from 31st Division, February 1915)

127th Field Company (joined by June 1915)

22nd Divisional Signals Company (joined Sep 1914)

---

Field Ambulances

66th (joined October 14)

67th (joined October 14)

68th (joined October 14)

---

Divisional Troops

9th (Service) Bn (Pioneers), the Border (joined from 66th Brigade February 1915)

22nd Divisional Train ASC (186, 187, 188 and 189 Coys ASC joined October 1914 but moved to 30th Division when Division left France; 108, 109, 110 and 111 Coys ASC joined from 10th Division when in Salonika)

34th Mobile Veterinary Section, AVC

No 39 Sanitary Section

816 Divisional Employment Company (formed 10 October 1917)

22nd Divisional Motor Ambulance Workshop (did not proceed with Division from France to Salonika)

This Division had no medium or heavy Trench Mortar Batteries