12th Cavalry Brigade ( British Indian Army ) The North Midland Mounted Brigade ( later numbered as the 22nd Mounted Brigade ) was a yeomanry brigade of the British Army , formed as part of the Territorial Force in 1908 . It served in the Sinai and Palestine Campaign in World War I . 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 . Formation . Under the terms of the Territorial and Reserve Forces Act 1907 ( 7 Edw . 7 , c . 9 ) , the brigade was formed in 1908 as part of the Territorial Force . It consisted of three yeomanry regiments , a horse artillery battery and ammunition column , a transport and supply column and a field ambulance . As the name suggests , the units were drawn from the northern part of the English Midlands , predominantly Leicestershire , Lincolnshire and Staffordshire . World War I . North Midland Mounted Brigade . The brigade was embodied on 4 August 1914 and assigned to Third Army of the Central Force . It moved to Norfolk and joined 1st Mounted Division in September 1914 replacing the Nottinghamshire and Derbyshire Mounted Brigade . It remained with 1st Mounted Division until October 1915 when it departed ( as a mounted formation ) for the Mediterranean . The Leicestershire Yeomanry left the brigade in late October 1914 and was posted to the BEF , joining the 7th Cavalry Brigade . It was initially replaced by the Welsh Horse before it transferred to the Eastern Mounted Brigade in February 1915 . In May 1915 , the East Riding of Yorkshire Yeomanry joined to bring the brigade back up to a three regiment strength . The brigade was replaced in 1st Mounted Division by its 2nd Line . On 27 Octeober 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 . On arrival in Egypt , the North Midland Mounted Brigade was assigned to the Western Frontier Force . 22nd Mounted Brigade . 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 . The 18th Machine Gun Squadron was formed on 8 January 1917 . The brigade joined the ANZAC Mounted Division in February 1917 and took part in the First and Second Battles of Gaza . The complete brigade was transferred to the newly formed Yeomanry Mounted Division on 6 July 1917 , joining it at el Fuqari . From 31 October it took part in the Third Battle of Gaza , including the Battle of Beersheba and the Capture of the Sheria Position . It took part in the Battle of Mughar Ridge on 13 and 14 November and the Battle of Nebi Samwil for 17 to 24 November . From 27 to 29 November , it withstood the Turkish counter - attacks during the Capture of Jerusalem . 12th Cavalry Brigade . In March 1918 , the 1st Indian Cavalry Division was broken up in France . The British units ( notably 6th Dragoons , 17th Lancers , 1 / 1st Queen ' s Own Yorkshire Dragoons and A , Q and U Batteries RHA ) remained in France and the Indian elements were sent to Egypt . 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 " and its title was changed to 1st Mounted Division , the third distinct division to bear this title . On 24 April 1918 , the 22nd Mounted Brigade was merged with elements of the 2nd ( Sialkot ) Cavalry Brigade : On 22 July 1918 , the 1st Mounted Division was renumbered as the 4th Cavalry Division and the brigade as 12th Cavalry Brigade . The sub units ( Signal Troop , Combined Cavalry Field Ambulance and Mobile Veterinary Section ) were renumbered on the same date . The brigade remained with 4th Cavalry Division for the rest of the war , taking part in the Battle of Megiddo and the Capture of Damascus . Commanders . The North Midland Mounted Brigade / 22nd Mounted Brigade / 12th Cavalry Brigade had the following commanders :