They landed at "A" Beach, Suvla Bay on 18 August and moved into bivouacs at Lala Baba on 20 August. On 21 August it advanced to Chocolate Hill via Salt Lake and Hetman Chair and took part in the attack on Scimitar Hill. Due to losses at the Battle of Scimitar Hill and wastage in 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. Each brigade formed a battalion sized unit, for example, "2nd South Midland Regiment" and each regiment a sub-unit. The brigade embarked for Mudros on 31 October and returned to Egypt in December 1915 where its component units were re-formed and remounted.