Entrenching battalions

; 1st Anzac Entrenching Battalion

:Formed in 1916 and provided a reinforcement pool to I ANZAC Corps. After the heavy casualties suffered during the Battle of Pozières between July and September 1916 the battalions remaining manpower was absorbed by the Australian Infantry battalions. The 1st Anzac Entrenching Battalion later absorbed the surplus reinforcements for the Australian tunnelling companies and worked with the Canadian tunnellers at Ypres. The battalion was disbanded in late 1917.

Entrenching battalions were first formed in the British Army in July 1916 and were allocated at Corps level. The practice ceased on the Western Front by autumn 1917, due to manpower shortages, but saw a revival at the start of 1918. The reduction in the number of battalions in an infantry brigade (from four to three) resulted in many (under-manned) infantry battalions being disbanded. Following the disbandment of these infantry battalions in February 1918, the pool of men was used to bring the remaining battalions up to strength, and to allocate any remaining manpower surplus to 25 entrenching battalions. These battalions were put to use in improving the existing defences in anticipation of a German offensive, and could be used as a reserve force if needed.

The entrenching battalions were disbanded in April 1918, with their troops apportioned to infantry battalions to make good the losses suffered following Operation Michael, which began the German spring offensive of 1918. Many of their war diariesthe WO 95 series from 1918 have survived and can be consulted at the National Archives at Kew though the 1918 war diaries for the 1st, 6th, 7th, 10th, 13th, 15th and 17th Entrenching Battalions have not survived.

The following entrenching battalions were formed:[https://discovery.nationalarchives.gov.uk/details/r/C4558646 Entrenching Battalions, The National Archives, Kew, file WO 95/5494.]

; 1st Entrenching Battalion

:The Battalion appears to have been stationed in Salonika in 1918.

; 2nd Entrenching Battalion

:The Battalion appears to have been stationed in Salonika in 1918. The unit was commanded by Hubert Carr-Gomm.

; 3rd Entrenching Battalion

:Formed from a number of battalion elements.{{cite web|url=https://www.greatwarforum.org/topic/49971-3rd-entrenching-battalion |title=3rd entrenching battalion – Units and formations – Great War Forum |date=28 March 2006 |publisher=greatwarforum.org |access-date=2014-02-21}}

; 4th Entrenching Battalion

:Formed primarily from the disbanded 13th Battalion East Yorkshire Regiment,{{cite web |url=http://www.warpath.orbat.com/divs/31_div.htm |title=31st Division |publisher=Warpath.orbat.com |access-date=2014-02-21 |url-status=dead |archive-url=https://web.archive.org/web/20131104025945/http://www.warpath.orbat.com/divs/31_div.htm |archive-date=2013-11-04 }} and a small number of former members of 14th Battalion York and Lancaster Regiment (aka 2nd Barnsley Pals),{{cite web|url=http://www.faulder.eu/ancestry/Family%20Tree%20-%20John%20Story%20&%20Mary%20Caruthers.pdf |title=Family Tree – John Story & Mary Caruthers |publisher=Faulder.eu |access-date=2014-02-21}} although many of the 2nd Barnsley Pals were to join the 1st Barnsley Pals.{{cite web|url=https://www.greatwarforum.org/topic/1204-york-lancaster-regt |title=York & Lancaster Regt – Units and formations – Great War Forum |date=14 February 2003 |publisher=greatwarforum.org |access-date=2014-02-21}}

; 5th Entrenching Battalion

:Formed from the 13th Battalion Cheshire Regiment,{{cite web |url=http://www.warpath.orbat.com/divs/25_div.htm |title=25th Division |publisher=Warpath.orbat.com |access-date=2014-02-21 |url-status=dead |archive-url=https://web.archive.org/web/20131104024721/http://www.warpath.orbat.com/divs/25_div.htm |archive-date=2013-11-04 }} 8th Battalion Bedfordshire Regiment, 9th Battalion Suffolk Regiment and 8th Battalion Loyal North Lancashire Regiment.{{cite web|url=http://www.bedfordregiment.org.uk/8thbn/8thbtn1918diary.html |title=8th Bn 1918 War Diary |publisher=Bedfordregiment.org.uk |access-date=2014-02-21}}

; 6th Entrenching Battalion

:Formed from the 11th Battalion Kings Own (Royal Lancaster) Regiment.{{cite web|url=http://www.christopherlong.co.uk/pri/somann.html |title=CHRISTOPHER A LONG - The Somme, 1916 |publisher=Christopherlong.co.uk |access-date=2014-02-21}}

; 7th Entrenching Battalion

:Formed from the Nelson Battalion, Royal Naval Division,{{cite web|url=https://www.greatwarforum.org/topic/140891-nelson-battalion-rnd-march-1918 |title=Nelson Battalion, RND, March 1918 - Units and formations - Great War Forum |date=23 January 2010 |publisher=greatwarforum.org |access-date=2018-09-25}} and 8th (Service) Battalion, The South Staffordshire Regiment.{{cite web|url=http://www.1914-1918.net/sstaffs.htm |title=The South Staffordshire Regiment in 1914-1918 |publisher=1914-1918.net |access-date=2014-02-21}}

; 8th Entrenching Battalion

:Formed from the 10th and 19th (Service) Battalions of the Royal Welsh Fusiliers.{{cite web |last1=Baker |first1=Chris |title=Entrenching Battalions |url=http://www.longlongtrail.co.uk/army/other-aspects-of-order-of-battle/entrenching-battalions/ |website=The Long, Long Trail |access-date=6 December 2018}}

; 9th Entrenching Battalion

:Formed from the 3rd Battalion, Monmouthshire Regiment.{{cite web |url=http://www.blaenau-gwent.gov.uk/8052.asp |title=Blaenau Gwent County Borough Council – 3rd Battalion the Monmouthshire Regiment |publisher=Blaenau-gwent.gov.uk |access-date=2014-02-21 |url-status=dead |archive-url=https://web.archive.org/web/20130509055454/http://www.blaenau-gwent.gov.uk/8052.asp |archive-date=2013-05-09 }}

; 10th Entrenching Battalion

:Formed from the disbanded 8th Battalion East Yorkshire Regiment and 12th Battalion West Yorkshire Regiment. Disbanded on 5 April 1918.{{cite web|url=https://www.greatwarforum.org/topic/122582-8th-bneast-yorks1917-10th-entrenching-bn-1918 |title=8th Bn.East Yorks,1917; 10th Entrenching Bn. 1918 - Units and formations - Great War Forum |date=3 May 2009 |publisher=greatwarforum.org |access-date=2018-09-25}} These men subsequently joined the 7th Battalion East Yorkshire Regiment and 10th Battalion West Yorkshire Regiment.

;11th Entrenching Battalion

:Formed on 20 February 1918 from the battalion headquarters and residue of the disbanded 3/10th Battalion, Middlesex Regiment, and the residue of the Household Battalion (a battalion raised from the Household Cavalry). Joined on 16 March 1918 by the residue of the 11th (Service) Battalion, Queen's Own Royal West Kent Regiment (Lewisham), just arrived from Italy and disbanded on the Western Front. The battalion was working under XVII Corps in Third Army when the German spring offensive opened. It manned and improved the 'Purple Line' near Arras, but there was no breakthrough there, and at the end of the month the battalion was moved behind the Amiens sector until the end of the Michael offensive.Frederick, p. 214.[https://discovery.nationalarchives.gov.uk/details/r/c644a1c4c112444aa128fc4ed02731c3 11th Entrenching Bn War Diary, TNA file WO 95/905/6]; most of this relates to the battalion existing between November 1916 and April 1917; only a fragment remains from March 1918.James, pp. 11, 91, 93.Wyrall, Vol II, pp. 181–3.[http://www.longlongtrail.co.uk/army/regiments-and-corps/the-british-infantry-regiments-of-1914-1918/the-duke-of-cambridges-own-middlesex-regiment/ Middlesex Regiment at Long, Long Trail.][http://www.longlongtrail.co.uk/army/regiments-and-corps/cavalry-regiments/the-household-battalion/ Household Battalion at Long, Long Trail.][http://www.longlongtrail.co.uk/army/regiments-and-corps/the-british-infantry-regiments-of-1914-1918/the-queens-own-royal-west-kent-regiment/ Royal West Kent Regiment at Long, Long Trail.]

; 12th Entrenching Battalion

:Formed from elements of four disbanded battalions of 35th Division: 23rd (Service) Battalion, Manchester Regiment (8th City),James, p. 98.{{cite web|url=http://www.themanchesters.org/23rd%20batt.htm |title=23rd Battalion |publisher=Themanchesters.org |access-date=2024-02-22}} 20th (Service) Battalion, Lancashire Fusiliers (4th Salford),James, p. 64. 16th (Service) Battalion, Cheshire Regiment (2nd Birkenhead),James, p. 66. and 14th (Service) Battalion, Gloucestershire Regiment (West of England).James, p. 72. Battalion headquarters of 23rd Manchesters transferred to the 12th Entrenching Bn and the commanding officer until 18 March was Lieutenant Colonel L.M. Stevens, DSO, from that battalion.{{cite web|url=http://www.tameside.gov.uk/museumsgalleries/mom/history/service1914 |title=Service Battalions 1914-1919 |publisher=Tameside.gov.uk |access-date=2014-02-21}} During the German spring offensive it was engaged in heavy fighting in the defence of the Crozat Canal, after which it was absorbed into 7th Royal West Kent Regiment.[https://discovery.nationalarchives.gov.uk/details/r/026de6d9c25d4820a25c16e51e12653f 12th Entrenching Battalion War Diary, TNA file WO 95/761/5.]

; 13th Entrenching Battalion

:Formed from the 10th (Service) Battalion, Gloucestershire Regiment.{{cite web|url=http://glosters.tripod.com/ww1batsp.htm |title=1st War Battalions |publisher=Glosters.tripod.com |access-date=2014-02-21}}

; 14th Entrenching Battalion

:Formed from the 7th Battalion, Kings Own Yorkshire Light Infantry.{{cite web|url=http://www.ordersofbattle.darkscape.net/site/warpath/divs/20_div.htm |title=20th (Light) Division |publisher=Ordersofbattle.darkscape.net |access-date=2014-02-21 |url-status=dead |archive-url=https://web.archive.org/web/20120208160434/http://www.ordersofbattle.darkscape.net/site/warpath/divs/20_div.htm |archive-date=2012-02-08 }}

; 15th Entrenching Battalion

:Formed from the 8th Battalion, East Lancaster Regiment.{{cite web|author=Stephen Barker |url=http://www.8theastlancs.co.uk/3rd%20Ypres.html |title=8theastlancs.co.uk |publisher=8theastlancs.co.uk |access-date=2014-02-21}}

; 16th Entrenching Battalion

:Formed from half of the disbanded 6th Battalion King's Own Yorkshire Light Infantry.{{cite web|url=http://frontforum.westernfrontassociation.com/viewtopic.php?f=31&t=91 |archive-url=https://web.archive.org/web/20110718032038/http://frontforum.westernfrontassociation.com/viewtopic.php?f=31&t=91 |url-status=dead |archive-date=2011-07-18 |title=The Western Front Association Front Forum: discussing The Great War 1914-18 • View topic - 16th entrenching battalion |publisher=Frontforum.westernfrontassociation.com |access-date=2014-02-21 }}

; 17th Entrenching Battalion

:Formed from elements of the 18th Battalion Manchester Regiment.{{cite web|url=http://www.themanchesters.org/18th%20batt3.htm |title=18th Battalion |publisher=Themanchesters.org |access-date=2014-02-21}} The battalion was with the 49th (West Riding) Division during the Spring Offensive.{{cite web |url=http://freespace.virgin.net/sh.k/49diary.html |title=The 16th Irish Division in the Great War: The Kaiser's Battle, March 1918 |publisher=Freespace.virgin.net |date=1918-03-31 |access-date=2014-02-21 |url-status=dead |archive-url=https://web.archive.org/web/20140131150328/http://freespace.virgin.net/sh.k/49diary.html |archive-date=2014-01-31 }}

; 18th Entrenching Battalion

:Formed from the 12th Battalion, Middlesex Regiment.{{cite web |url=http://freespace.virgin.net/howard.anderson/allocations.htm |title=1st Battalion Middlesex Regiment |publisher=Freespace.virgin.net |access-date=2014-02-21 |url-status=dead |archive-url=https://web.archive.org/web/20141104032129/http://freespace.virgin.net/howard.anderson/allocations.htm |archive-date=2014-11-04 }}

; 19th Entrenching Battalion

:Formed from the 10th (Service) Battalion, Royal Dublin Fusiliers, 7th (Service) Battalion, Leinster Regiment and details from the 16th (Irish) Division.

; 20th Entrenching Battalion

:Formed from men of the 3/4th (T.F.) Battalion Queen's Royal Regiment (West Surrey), 8th and 9th (Service) Battalion Royal Dublin Fusiliers, 9th (Service) Battalion Leicestershire Regiment, 10th (Service) Yorkshire Regiment, 10th (Service) King's Own Yorkshire Light Infantry, 14th (Service) Hampshire Regiment and 3rd South African Infantry Regiment.

; 21st Entrenching Battalion

:Formed from the 10th Battalion, Royal Irish Rifles.{{cite web|url=http://www.warpath.orbat.com/divs/36_div.htm |title=36th (Ulster) Division |publisher=Warpath.orbat.com |access-date=2014-02-21 |url-status=dead |archive-url=https://web.archive.org/web/20160304101845/http://www.warpath.orbat.com/divs/36_div.htm |archive-date=2016-03-04 }}

; 22nd Entrenching Battalion

:Formed from the 11/13th Royal Irish Rifles.

; 23rd Entrenching Battalion

:Formed from the 14th Battalion Royal Irish Rifles and 11th Battalion Royal Inniskilling Fusiliers.{{cite web|url=http://www.circlecity.co.uk/wartime/board/index.php?page=30 |title=The World War I Message Board (Page 30) |publisher=Circlecity.co.uk |access-date=2014-02-21}}

; 24th Entrenching Battalion

:Formed from the 2/5th (T.F.) Battalion Royal Warwickshire Regiment,{{cite web|url=http://battlefields1418.50megs.com/regiment012.htm |title=The Royal Warwickshire Regiment 1914-1918 |publisher=Battlefields1418.50megs.com |date=1916-07-01 |access-date=2014-02-21}} the 2/4th and 2/6th (T.F.) Battalions Gloucestershire Regiment.{{cite web|url=http://www.glosters.org.uk/textonly_timeline/5 |title=Soldiers of Gloucestershire |publisher=Glosters.org.uk |access-date=2014-02-21}}

; 25th Entrenching Battalion

:Formed from the 2/1st Buckinghamshire Battalion,{{cite web|url=http://www.1914-1918.net/oxbucks.htm |title=The Oxfordshire & Buckinghamshire Light Infantry in 1914-1918 |publisher=1914-1918.net |access-date=2014-02-21}} the 2/7th and 2/8th (T.F.) Battalions Royal Warwickshire Regiment. These men subsequently joined the 2/4th Oxfordshire & Buckinghamshire Light Infantry when the battalion was disbanded in April 1918.

File:Officers of the 1st Canadian Entrenching Battalion.jpg

The Canadian Expeditionary Force formed four entrenching battalions in July 1916, one for each of the respective divisions. They were disbanded in September 1917 with the creation of the Canadian Corps Reinforcement Camp.

; 1st Canadian Entrenching Battalion

:Attached to the 1st Canadian Division

; 2nd Canadian Entrenching Battalion

:Attached to the 2nd Canadian Division

; 3rd Canadian Entrenching Battalion

:Attached to the 3rd Canadian Division

; 4th Canadian Entrenching Battalion

:Attached to the 4th Canadian Division

File:1st New Zealand Entrenching Battalion inspected by King George V.jpg inspecting the 1st New Zealand Entrenching Battalion]]

The New Zealand Expeditionary Force formed the New Zealand Entrenching Group in February 1918. It consisted of three entrenching battalions with the manpower drawn from men of the disbanded 4th New Zealand Infantry Brigade. Each of the Battalions was attached to one of the remaining three New Zealand Infantry brigades. The Entrenching Battalions were disbanded in October 1918.

; 1st New Zealand Entrenching Battalion

:Attached to the 1st New Zealand Infantry Brigade. Formed from men of the Auckland and Wellington infantry regiments

; 2nd New Zealand Entrenching Battalion

:Attached to the 2nd New Zealand Infantry Brigade. Formed from men of the Canterbury and Otago infantry regiments. Became serious engaged in the Battle of the Lys in April 1918, taking 400 casualties.{{cite book|title=Official History Of The Otago Regiment, N.Z.E.F. in The Great War 1914–1918|year=1921|last=Byrne|first=A. E. |publisher=J. Wilkie & Company|url=http://nzetc.victoria.ac.nz/tm/scholarly/tei-WH1-Otag-t1-body-d2-d14.html|isbn=9781843425694|pages=303–308}}

; 3rd New Zealand Entrenching Battalion

:Attached to the 3rd New Zealand (Rifle) Brigade. Formed from men of the New Zealand Rifle Brigade

{{Reflist|colwidth=30em}}

• J.B.M. Frederick, Lineage Book of British Land Forces 1660–1978, Vol I, Wakefield: Microform Academic, 1984, ISBN 1-85117-007-3.
• Brig E.A. James, British Regiments 1914–18, London: Samson Books, 1978, ISBN 0-906304-03-2/Uckfield: Naval & Military Press, 2001, ISBN 978-1-84342-197-9.
• Everard Wyrall, The Die-Hards in the Great War, Vol II, 1916–1919, London: Harrisons, 1930/Uckfield: Naval & Military Press, 2002, ISBN 978-1-84734-575-2.

• [http://www.longlongtrail.co.uk Chris Baker, The Long, Long Trail]

{{DEFAULTSORT:Entrenching Battalions (WW1)}}

Category:Battalions of the British Army in World War I

Category:Military units and formations of Australia in World War I

Category:Military units and formations of Canada in World War I

Category:Military units and formations of New Zealand in World War I