The 3rd Mounted Division was a Yeomanry Division of the British Army active during World War I. It was formed on 6 March 1915 as the 2/2nd Mounted Division, a replacement/depot formation for the 2nd Mounted Division which was being sent abroad on active service. In March 1916, it was renumbered as the 3rd Mounted Division and in July 1916 as the 1st Mounted Division. In September 1917, the division was reorganized as a cyclist formation and redesignated as The Cyclist Division. It remained in the United Kingdom throughout the war and was disbanded in June 1919.
The 1st Mounted Division was a Yeomanry Division of the British Army active during World War I. It was formed in August 1914 for the home defence of the United Kingdom from four existing mounted brigades of the Territorial Force, each of three regiments of Yeomanry. The divisional order of battle changed often, as the 1st Line brigades left for service overseas and were replaced by 2nd Line formations. It was converted to the 1st Cyclist Division in July 1916, and was broken up in November 1916 without being involved in active service. It remained in East Anglia throughout its existence.
The Welsh Horse Yeomanry was a yeomanry regiment of the British Army that served in the First World War. The regiment was raised shortly after the outbreak of the war. Initially it served in East Anglia on anti-invasion duties, before being dismounted in 1915 and sent to take part in the Gallipoli Campaign. After withdrawal to Egypt, it was amalgamated with the 1/1st Montgomeryshire Yeomanry as the 25th Battalion, Royal Welch Fusiliers and served as such throughout the rest of the war. It took part in the Sinai and Palestine Campaign in 1917 and 1918, before being transferred to the Western Front where it remained until the end of the war. The regiment formed 2nd and 3rd Lines in 1914, but these never left the United Kingdom before being disbanded in 1916 and early 1917, respectively. The 1st Line was disbanded in 1919.
The East Midland Brigade was an infantry brigade of the Territorial Force, part of the British Army, that was raised in 1908. As the name suggests, it commanded infantry battalions recruited in the East Midlands of England: Bedfordshire, Northamptonshire, Cambridgeshire and Hertfordshire. The brigade was an integral part of the East Anglian Division.
The 45th Infantry Division was an infantry division of the Territorial Force, part of the British Army. It was formed in the First World War as a duplicate of the 43rd (Wessex) Division and was originally formed as the 2nd Wessex Division in 1914–1915 before later being renamed as the 45th Division and the brigades numbered. It was sent overseas to India in December 1914 to relieve Regular Army units for service in France. The division remained there for the rest of the war, supplying drafts of replacements to the British units fighting in the Middle East and later complete battalions.
The 206th Brigade was a formation of the British Army during World War I. It was raised as a 2nd-Line duplicate of the Essex Brigade of the Territorial Force and formed part of the 69th Division. It served as a training formation in the United Kingdom without going overseas.
The 207th Brigade was a formation of the British Army during World War I. It was raised as a 2nd-Line duplicate of the 162nd Brigade of the Territorial Force and formed part of the 69th Division. It served as a training formation in the United Kingdom without going overseas.
The 134th Infantry Brigade was an infantry brigade of the Territorial Force, part of the British Army. It was formed in the First World War as a duplicate of the Hampshire Brigade and was originally formed as the 2nd/1st Hampshire Brigade in 1914–1915 before later being renamed as the 134th Brigade. It was sent overseas to India in December 1914 to relieve Regular Army units for service in France. The brigade remained there for the rest of the war, supplying drafts of replacements to the British units fighting in the Middle East and later complete battalions. By September 1917 the last of its battalions had departed.
The 135th Infantry Brigade was an infantry brigade of the Territorial Force, part of the British Army. It was formed in the First World War as a duplicate of the South Western Brigade and was originally formed as the 2nd/1st South Western Brigade in 1914–1915 before later being renamed as the 135th Brigade. It was sent overseas to India in December 1914 to relieve Regular Army units for service in France. The brigade remained there for the rest of the war, supplying drafts of replacements to the British units fighting in the Middle East and later complete battalions.
The 136th Infantry Brigade was an infantry brigade of the Territorial Force, part of the British Army. It was formed in the First World War as a duplicate of the Devon and Cornwall Brigade and was originally formed as the 2nd/1st Devon and Cornwall Brigade in 1914–1915 before later being renamed as the 136th Brigade. It was sent overseas to India in December 1914 to relieve Regular Army units for service in France. The brigade remained there for the rest of the war, supplying drafts of replacements to the British units fighting in the Middle East and later complete battalions.
The 17th Mounted Brigade previously known as the 2/1st Welsh Border Mounted Brigade was a 2nd Line yeomanry brigade of the British Army during the First World War. In July 1916 it was converted to a cyclist formation as 10th Cyclist Brigade and in November 1916 was redesignated as 6th Cyclist Brigade. It was still in existence, in Ireland, at the end of the war.
The Essex Royal Horse Artillery was a Territorial Force Royal Horse Artillery battery that was formed in Essex in 1908. It saw active service during the First World War in Egypt and Palestine from 1916 to 1918, initially as field artillery with 52nd (Lowland) Division before being converted back to horse artillery and serving with the 2nd Mounted / 5th Cavalry Division. A second line battery, 2/1st Essex RHA, served on the Western Front in 1917 and 1918 as part of an Army Field Artillery Brigade.
The Glamorganshire Royal Horse Artillery was a Territorial Force Royal Horse Artillery battery that was formed in Glamorganshire in 1908. It saw active service during the First World War on the Western Front in 1917 and 1918 as part of an Army Field Artillery Brigade. A second line battery, 2/1st Glamorganshire RHA, served in England and Ireland before being broken up in January 1917. Glamorganshire RHA was not reconstituted in the post-war Territorial Force.
The Shropshire Royal Horse Artillery was a Territorial Force Royal Horse Artillery battery that was formed in Shropshire in 1908 from the Shropshire Battery of the 1st Shropshire and Staffordshire Artillery Volunteers, Royal Garrison Artillery of the Volunteer Force. It saw active service during the First World War on the Western Front in 1917 and 1918 as part of an Army Field Artillery Brigade. A second line battery, 2/1st Shropshire RHA, also served on the Western Front in 1917 and 1918 as part of another Army Field Artillery Brigade. It was reconstituted post-war as a medium artillery battery and served as such in the Second World War.
The 2nd Home Counties Division was a 2nd Line Territorial Force division of the British Army in World War I. The division was formed as a duplicate of the 44th Division in November 1914. As the name suggests, the division recruited in the Home Counties, particularly Kent, Middlesex, Surrey and Sussex. In August 1915, in common with all Territorial Force divisions, it was numbered as 67th Division. Between September 1917 and the end of the year, the division was extensively reorganized and lost its territorial identity; henceforth it was known as 67th Division.
The 2nd Welsh Division was a 2nd Line Territorial Force division of the British Army in the First World War. The division was formed as a duplicate of the 53rd (Welsh) Division in January 1915. As the name suggests, the division recruited in Wales, but also included units from Cheshire and Herefordshire in England. In August 1915, in common with all Territorial Force divisions, it was numbered as 68th Division. During the winter of 1917–18, the division was extensively reorganized and lost its territorial identity; henceforth it was known as 68th Division.
The 2/1st Black Watch Brigade was a 2nd Line Territorial Force infantry brigade of the British Army in World War I. The brigade was formed as a duplicate of the Black Watch Brigade in January 1915. As the name would suggest, it was organized with four battalions of the Black Watch, It was dissolved in November 1915 as its constituent battalions were posted to other formations.
The IV East Anglian Brigade of the Royal Field Artillery was a unit of Britain's Territorial Force (TF) from 1908 to 1919. It served in the Sinai and Palestine Campaign during World War I.
The 1st Essex Artillery Volunteers was a unit of Britain's part-time auxiliary forces raised in Essex in 1860 in response to an invasion scare. It served under various designations as field artillery in Palestine during World War I. During World War II its units served as mountain artillery in Italy and as jungle artillery and medium artillery in Burma. Postwar it became an airborne unit until it was merged with other units in the 1950s.
The 1st Norfolk Artillery Volunteers was a unit of Britain's Volunteer Force raised in the County of Norfolk in 1859 as a response to a French invasion threat. It became part of the Territorial Force in 1908 and served under various designations as field artillery in Palestine during World War I, and as heavy anti-aircraft artillery in North Africa and Italy during World War II. It disappeared in a merger in 1955.
United Kingdom 
British Army 