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21st Division (United Kingdom)

21st Division
Active World War I
1914 - May 1919
Country United Kingdom
Branch New Army
Type Infantry
Engagements Battle of Loos
Battle of the Somme
Battle of Arras
Battle of Passchendaele
Battle of Cambrai

The British 21st Division was a New Army division raised in September 1914. The division moved to France in September 1915 and served on the Western Front for the duration of the First World War.

The division's insignia was the "triple-seven".


  • Unit history 1
  • Formation 2
  • Battles 3
  • Commanders 4
  • See also 5
  • References 6
  • Bibliography 7
  • External links 8

Unit history

The Division was the first of the six created for the Third New Army on 13 September 1914. The division suffered 55,581 killed, wounded and missing, being the highest number of casualties suffered by any New Army division.[1] The Division ceased to exist on 19 May 1919.


62nd Brigade
63rd Brigade

In July 1916 the brigade moved to the 37th Division, swapping with the 110th Brigade.

64th Brigade
  • 9th (Service) Battalion, King's Own Yorkshire Light Infantry
  • 10th (Service) Battalion, King's Own Yorkshire Light Infantry (disbanded February 1918)
  • 14th (Service) Battalion, Durham Light Infantry (until November 1915)
  • 15th (Service) Battalion, Durham Light Infantry
  • 1st Battalion, East Yorkshire Regiment (from November 1915)
110th Brigade

In July 1916 the brigade joined from the 37th Division, swapping with the 63rd Brigade.



The division took part in the Battle of Loos, Battle of the Somme, Battle of Arras, Battle of Passchendaele and Battle of Cambrai.[1]


During its existence, 21st Division had the following commanders:[2]

  • 16 September 1914 Lt Gen E.T.H. Hutton
  • 11 April 1915 Major-General G.T. Forestier-Walker
  • 18 November 1915 Major-General C.W. Jacob (wounded, 4 March 1916)
  • 4 March 1916 Brig.-General G.M. Gloster (temporary)
  • 1 April 1916 Major-General C.W. Jacob
  • 22 May 1916 Major-General D.G.M. Campbell

See also


  1. ^ a b 21 st Division
  2. ^ Becke 1938, p. 103


  • Becke, Major A.F. (1938). Order of Battle of Divisions Part 3A. New Army Divisions (9–26). London: His Majesty's Stationery Office.  

External links

  • The British Army in the Great War: The 21st Division
  • 21st division 1914-18
  • 21st Infantry Division on the Western Front 1914-1918: a case study in tactical evolution, Kathryn Louise Snowden (2001)
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