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Cavalry Reserve Regiments (United Kingdom)

From Wikipedia, the free encyclopedia

Seventeen Cavalry Reserve Regiments were formed by the British Army on the outbreak of the Great War in August, 1914.[1] These were affiliated with one or more active cavalry regiments, their purpose being to train replacement drafts for the active regiments. In 1915, the 3rd Line[a] regiments of the Yeomanry were also affiliated with the Cavalry Reserve and, in September 1916, the Household Cavalry Reserve Regiment was formed in Windsor, supplying replacements to the dismounted Household Battalion. In 1917, the regiments underwent major reorganization, being reduced to ten in number.

Although nominally cavalry, many of the drafts ended up being converted into infantry in order to satisfy the manpower demands of trench warfare.

Despite being training and not combat formations, several were involved in the putting down of the Easter Rising in Dublin in April 1916. A little after noon on Easter Monday, a mixed troop of 9th and 12th Lancers, attached to the 6th Cavalry Reserve Regiment at Marlborough Barracks in Phoenix Park, was dispatched to investigate a "disturbance" at Dublin Castle.[3] As they cantered down Sackville Street, they were fired upon by rebels who had taken up positions in and on the roof of the General Post Office. Three troopers were killed instantly and one was mortally wounded, becoming the first military casualties of the rising. The same evening, 1,600 men of the 3rd Reserve Cavalry Brigade (consisting of the 8th, 9th and 10th Cavalry Reserve Regiments) arrived from their barracks at the Curragh to support the local Dublin garrison.[4]

Original August 1914 Formations

Regiment Location Affiliated Regiments Remarks
1st Life Guards Hyde Park 1st Life Guards
2nd Life Guards Windsor 2nd Life Guards
Royal Horse Guards Regent's Park Royal Horse Guards
1st Aldershot 1st Dragoon Guards
5th Dragoon Guards
3/1st Queen's Own Royal Glasgow Yeomanry
3/1st Sherwood Rangers Yeomanry
Absorbed into 4th, 1917
2nd Aldershot 2nd Dragoon Guards
6th Dragoons
3/1st Essex Yeomanry
3/1st Lothians and Border Horse
Absorbed into 4th, 1917
3rd Canterbury 3rd Dragoon Guards
6th Dragoon Guards
3/1st Northamptonshire Yeomanry
2/1st Surrey Yeomanry
1/1st Sussex Yeomanry
Absorbed into 6th, 1917
4th Tidworth 4th Dragoon Guards
7th Dragoon Guards
3/1st Warwickshire Yeomanry
3/1st Royal Gloucestershire Hussars
3/1st Queen's Own Worcestershire Hussars
Absorbed into 6th, 1917
5th York 1st Dragoons
2nd Dragoons
3/1st Northumberland Hussars
3/1st Queen's Own Yorkshire Dragoons
3/1st Yorkshire Hussars
3/1st East Riding Yeomanry
Absorbed into 6th, 1917
6th Dublin 5th (Royal Irish) Lancers
12th Lancers
3/1st City of London Yeomanry
3/1st County of London Yeomanry
B Sqn composed mainly of a draft of 160 NCOs and men from 3/1st Welsh Horse Yeomanry
Absorbed into 1st, 1917
7th Tidworth 9th Lancers
21st Lancers
3/1st Royal Buckinghamshire Yeomanry
3/1st Berkshire Yeomanry
Absorbed into 1st, 1917
8th The Curragh 16th Lancers
17th Lancers
3/1st Queen's Own Dorset Yeomanry
3/1st Queen's Own Oxfordshire Hussars
Absorbed into 1st, 1917
9th Shorncliffe 3rd Hussars
7th Hussars
3/2nd County of London Yeomanry
3/3rd County of London Yeomanry
Absorbed into 2nd, 1917
10th The Curragh 4th Hussars
8th Hussars
3/1st Duke of Lancaster's Own Yeomanry
2/1st Lancashire Hussars
3/1st Westmorland and Cumberland Yeomanry
Absorbed into 2nd, 1917
11th Tidworth 10th Hussars
18th Hussars
3/1st Hampshire Yeomanry
3/1st North Somerset Yeomanry
3/1st Royal Wiltshire Yeomanry
Absorbed into 5th, 1917
12th Aldershot 11th Hussars
13th Hussars
3/1st Leicestershire Yeomanry
3/1st Lincolnshire Yeomanry
3/1st Staffordshire Yeomanry
Absorbed into 3rd, 1917
13th Colchester 14th Hussars
20th Hussars
3/1st Bedfordshire Yeomanry
3/1st Hertfordshire Yeomanry
Absorbed into 5th, 1917
14th Longmoor 15th Hussars
19th Hussars
3/1st Derbyshire Yeomanry
3/1st South Nottinghamshire Hussars
Absorbed into 3rd, 1917

Formed in 1916

Regiment Location Affiliated Regiments Remarks
Household Cavalry Windsor Household Battalion

After 1917 re-organization

Regiment Location Affiliated Regiments Remarks
1st Life Guards Hyde Park 1st Life Guards
2nd Life Guards Windsor 2nd Life Guards
Royal Horse Guards Regent's Park Royal Horse Guards
Household Cavalry Windsor Household Battalion Disbanded early 1918
1st The Curragh 5th Lancers
9th Lancers
12th Lancers
16th Lancers
17th Lancers
21st Lancers
3/1st Bedfordshire Yeomanry
3/1st Lincolnshire Yeomanry
3/1st City of London Yeomanry
2/1st Surrey Yeomanry
3/1st East Riding Yeomanry
2nd The Curragh 3rd Hussars
4th Hussars
7th Hussars
8th Hussars
3/1st Queen's Own Dorset Yeomanry
2/1st Lancashire Hussars
3/1st County of London Yeomanry
3/3rd County of London Yeomanry
3/1st South Nottinghamshire Hussars
3/1st Queen's Own Oxfordshire Hussars
3/1st Westmorland and Cumberland Yeomanry
3rd Aldershot 11th Hussars
13th Hussars
15th Hussars
19th Hussars
3/1st Royal Buckinghamshire Yeomanry
3/1st Leicestershire Yeomanry
3/1st Staffordshire Yeomanry
3/1st Royal Wiltshire Yeomanry
3/1st Sherwood Rangers Yeomanry
4th Aldershot 1st Dragoon Guards
2nd Dragoon Guards
5th Dragoon Guards
6th Dragoons
3/1st Derbyshire Yeomanry
3/1st Essex Yeomanry
3/1st Queen's Own Royal Glasgow Yeomanry
3/1st Hampshire Yeomanry
3/2nd County of London Yeomanry
3/1st Lothians and Border Horse
5th Tidworth 10th Hussars
14th Hussars
18th Hussars
20th Hussars
3/1st Northumberland Hussars
3/1st Yorkshire Hussars
3/1st Warwickshire Yeomanry
3/1st Royal Gloucestershire Hussars
3/1st Queen's Own Worcestershire Hussars
6th Tidworth 3rd Dragoon Guards
4th Dragoon Guards
6th Dragoon Guards
7th Dragoon Guards
1st Dragoons
2nd Dragoons
3/1st Berkshire Yeomanry
3/1st Hertfordshire Yeomanry
3/1st Duke of Lancaster's Own Yeomanry
3/1st Northamptonshire Yeomanry
3/1st North Somerset Yeomanry
3/1st Queen's Own Yorkshire Dragoons


  1. ^ In accordance with the Territorial and Reserve Forces Act 1907 (7 Edw. 7, c.9) which brought the Territorial Force into being, the TF was intended to be a home defence force for service during wartime and members could not be compelled to serve outside the country. However, on the outbreak of war on 4 August 1914, many members volunteered for Imperial Service. Therefore, TF units were split in August and September 1914 into 1st Line (liable for overseas service) and 2nd Line (home service for those unable or unwilling to serve overseas) units. Later, a 3rd Line was formed to act as a reserve, providing trained replacements for the 1st and 2nd Line regiments.[2]


  1. ^ The Cavalry Reserve Regiments The Long, Long Trail
  2. ^ Rinaldi 2008, p. 35
  3. ^ Ciaran Byrne, The Harp and Crown, the History of the 5th (Royal Irish) Lancers, 1902 - 1922, p. 105
  4. ^ General J.G. Maxwell, From the General Officer, Commanding-in-Chief, The Forces in Ireland. To the Field-Marshal, Commanding-in-Chief, The Home Forces. 25 May 1916


  • Rinaldi, Richard A (2008). Order of Battle of the British Army 1914. Ravi Rikhye. ISBN 978-0-97760728-0.
This page was last edited on 6 August 2021, at 13:04
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