The 1st South Midland Mounted Brigade (later numbered as the 5th Mounted Brigade) was a yeomanry brigade of the British Army, formed as part of the Territorial Force in 1908. It served dismounted in the Gallipoli Campaign before being remounted to serve in the Sinai and Palestine Campaign in the First World War. In April 1918, it was merged with elements of the 3rd (Ambala) Cavalry Brigade to form 13th 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 southern part of the English Midlands, predominantly Gloucestershire, Warwickshire and Worcestershire. First World War 1st South Midland Mounted Brigade The brigade was embodied on 4 August 1914 upon the outbreak of the First World War. It moved to East Anglia and joined the 1st Mounted Division. On 2 September it was transferred to the 2nd Mounted Division and in mid November 1914 it moved with its division to Norfolk on coastal defence duties. Egypt In April 1915, the 2nd Mounted Division moved to Egypt, the brigade arriving at Alexandria on 24 April. In May 1915 the brigade was designated 1st (1st South Midland) Mounted Brigade. It was dismounted in August 1915 and took part in the Gallipoli Campaign. Each regiment left a squadron headquarters and two troops (about 100 officers and men) in Egypt to look after the horses. Gallipoli The brigade landed at "A" Beach, Suvla Bay on the night of 17 August and moved into reserve positions at Lala Baba on the night of 20 August. On 21 August it advanced to Chocolate Hill under heavy fire and took part in the attack on Hill 112. Due to losses during the Battle of Scimitar Hill and wastage during August 1915, the 2nd Mounted Division had to be reorganised. On 4 September 1915, the 1st Composite Mounted Brigade was formed from the 1st (1st South Midland), 2nd (2nd South Midland) and 5th (Yeomanry) Mounted Brigades. The brigade formed a battalion sized unit 1st South Midland Regiment. The brigade embarked for Mudros on 31 October and