In April 1918, it was merged with elements of the 2nd (Sialkot) Cavalry Brigade to form 12th Cavalry Brigade. It remained in Palestine after the end of the war on occupation duties.
The brigade was replaced in 1st Mounted Division by its 2nd Line. On 27 October 1915, the brigade departed Southampton on RMS Victorian, Mercian and Nessian for Salonika. The destination was changed at sea, and the brigade disembarked at Alexandria between 10 and 20 November 1915, then moved to Cairo.[5] On arrival in Egypt, the North Midland Mounted Brigade was assigned to the Western Frontier Force.[8]
On 31 March 1916, the remaining Mounted Brigades were numbered in a single sequence. As a consequence, the North Midland Mounted Brigade was redesignated as 22nd Mounted Brigade.[10] The 18th Machine Gun Squadron was formed on 8 January 1917.[8]
By an Egyptian Expeditionary Force GHQ Order of 12 April 1918, the mounted troops of the EEF were reorganised when the Indian Army units arrived in theatre. On 24 April 1918, the Yeomanry Mounted Division was indianized[a] and its title was changed to 1st Mounted Division,[16] the third distinct division to bear this title.[b]
the 1/1st Staffordshire Yeomanry remained with the brigade
the 1/1st Lincolnshire Yeomanry and the 1/1st East Riding Yeomanry left the brigade on 7 April and were merged to form D Battalion, Machine Gun Corps. It was posted to France, arriving on 1 June
18th Machine Gun Squadron remained with the brigade
22nd Mounted Brigade Signal Troop remained with the brigade
on 24 April, 1/North Midland Cavalry Field Ambulance merged with Sialkot Cavalry Field Ambulance to form 22nd Combined Cavalry Field Ambulance
on 26 and 27 April, 3/1st North Midland Mobile Veterinary Section merged with Sialkot Mobile Veterinary Section to form 22nd Mobile Veterinary Section
On 22 July 1918, the 1st Mounted Division was renumbered as the 4th Cavalry Division and the brigade as 12th Cavalry Brigade.[14] The sub units (Signal Troop, Combined Cavalry Field Ambulance and Mobile Veterinary Section) were renumbered on the same date.[12]
After the Armistice of Mudros, the brigade remained with 4th Cavalry Division in Palestine as part of the occupation forces. However, demobilization began immediately and by May 1919 most of the British units had been repatriated. The division was finally broken up in 1921.[17]
Commanders
The North Midland Mounted Brigade[18] / 22nd Mounted Brigade[19] / 12th Cavalry Brigade[20] had the following commanders:
^British divisions were converted to the British Indian Army standard whereby brigades only retained one British regiment or battalion and most support units were Indian (artillery excepted).
Becke, Major A.F. (1936). Order of Battle of Divisions Part 2A. The Territorial Force Mounted Divisions and the 1st-Line Territorial Force Divisions (42-56). London: His Majesty's Stationery Office. ISBN1-871167-12-4.
Perry, F.W. (1992). Order of Battle of Divisions Part 5A. The Divisions of Australia, Canada and New Zealand and those in East Africa. Newport: Ray Westlake Military Books. ISBN1-871167-25-6.
Perry, F.W. (1993). Order of Battle of Divisions Part 5B. Indian Army Divisions. Newport: Ray Westlake Military Books. ISBN1-871167-23-X.
Rinaldi, Richard A (2008). Order of Battle of the British Army 1914. Ravi Rikhye. ISBN978-0-97760728-0.
Westlake, Ray (1992). British Territorial Units 1914-18. Osprey Publishing. ISBN978-1-85532-168-7.