The regiment sailed from Alexandria on 14 August, arriving at Mudros on 17 August. It landed at "A" Beach, Suvla Bay the following day and moved into reserve positions at Lala Baba on the night of 20 August. On 21 August, it advanced to Chocolate Hill and was in reserve for the attacks on Scimitar Hill and 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 1st (1st South Midland), 2nd (2nd South Midland) and 5th (Yeomanry) Mounted Brigades. Each dismounted brigade formed a battalion sized unit, hence the regiment was amalgamated with the Hertfordshire Yeomanry to form 5th Yeomanry Regiment.