The Australian Mounted Division originally formed as the Imperial Mounted Division in January 1917, was a mounted infantry, light horse and yeomanry division. The division was formed in Egypt, and along with the Anzac Mounted Division formed part of Desert Column, Egyptian Expeditionary Force in World War I. The division was originally made up of the Australian 3rd Light Horse Brigade, the reconstituted 4th Light Horse Brigade, and two British yeomanry brigades; the 5th Mounted Brigade and 6th Mounted Brigade.
The 2nd Mounted Division was a yeomanry division that served in the First World War. At the outbreak of war it was assigned to defence of the Norfolk coast. In March 1915 it formed a 2nd Line duplicate of itself, the 2/2nd Mounted Division. Leaving the 2/2nd on coastal defence, it then fought at Gallipoli from April to December 1915, under the command of Major General William Peyton, before being disbanded in January 1916.
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 4th Mounted Division was a short-lived Yeomanry Division of the British Army active during World War I. It was formed on 20 March 1916, converted to 2nd Cyclist Division in July 1916 and broken up on 16 November 1916. It remained in England on Home Defence duties throughout its existence.
The 1st South Midland Mounted Brigade was a yeomanry brigade of the British Army, formed as part of the Territorial Force in 1908.
The 2nd South Midland Mounted Brigade was a yeomanry brigade of the British Army, formed as part of the Territorial Force in 1908.
The London Mounted Brigade was a yeomanry brigade of the British Army, formed as part of the Territorial Force in 1908.
The North Midland Mounted Brigade was a yeomanry brigade of the British Army, formed as part of the Territorial Force in 1908.
The Nottinghamshire and Derbyshire Mounted Brigade was a yeomanry brigade of the British Army, formed as part of the Territorial Force in 1908.
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 Eastern Mounted Brigade was a formation of the Territorial Force of the British Army, organised in 1908. After serving dismounted in the Gallipoli Campaign, it was absorbed into the 3rd Dismounted Brigade in Egypt in February 1916.
The South Eastern Mounted Brigade was a formation of the Territorial Force of the British Army, organised in 1908. After service in the Gallipoli Campaign, it was absorbed into the 3rd Dismounted Brigade in Egypt in February 1916.
The Lowland Mounted Brigade was a formation of the Territorial Force of the British Army, organised in 1908. After service in the Gallipoli Campaign, it was absorbed into the 1st Dismounted Brigade in February 1916.
The Highland Mounted Brigade was a formation of the Territorial Force of the British Army, organised in 1908. After service in the Gallipoli Campaign and in the defence of Egypt, it was absorbed into the 2nd Dismounted Brigade in February 1916.
The 2nd South Western Mounted Brigade was a formation of the Territorial Force of the British Army, organised in 1908. After service in the Gallipoli Campaign and in the defence of Egypt, it was absorbed into the 2nd Dismounted Brigade in February 1916.
The Welsh Border Mounted Brigade was a formation of the Territorial Force of the British Army, organised in 1908. After home defence service, it was posted to Egypt, where it was absorbed into the 4th Dismounted Brigade in March 1916.
The 2nd Composite Mounted Brigade was a formation of the British Army in World War I. It was formed by the 2nd Mounted Division during the Gallipoli Campaign on 4 September 1915 by absorbing the Nottinghamshire and Derbyshire and London Mounted Brigades. The brigade was dissolved on return to Egypt in December 1915.
The Yeomanry Mounted Brigade was a formation of the Territorial Force of the British Army, raised in January 1915 during the First World War. After service in the Gallipoli Campaign and with the Western Frontier Force in World War I, it was broken up in March 1916.
B Battery, Honourable Artillery Company was a horse artillery battery that was formed from the Field Artillery, HAC in 1899. It transferred to the Territorial Force in 1908 as artillery support for the South Eastern Mounted Brigade.
United Kingdom 
British Army 