Leaving the 2/2nd on coastal defence, it then fought at Gallipoli from April to December 1915, under the command of Major General William Peyton, before being disbanded in January 1916.

The brigades were relatively widely dispersed to allow an adequate water supply for the horses and to provide sufficient training areas.

Field Ambulance, RAMC London Field Ambulance, RAMC 1/1st Royal Buckinghamshire Hussars 1/1st Queen's Own Oxfordshire Hussars 1/1st Queen's Own Dorset Yeomanry[n 1] 1/1st Berkshire Yeomanry I Brigade, Royal Horse Artillery (T.F.)

In early April, the division starting leaving Avonmouth and the last elements landed at Alexandria before the end of the month.

[9] Each Yeomanry Regiment left a squadron headquarters and two troops (about 100 officers and men) in Egypt to look after the horses.

[12] Due to losses during the Battle of Scimitar Hill and wastage during August 1915, the division had to be reorganised.

[13] Each dismounted brigade formed a battalion sized unit, for example, 1st South Midland Regiment (Warwickshire, Gloucestershire and Worcestershire Yeomanry).

[14] The Scottish Horse Mounted Brigade landed as Suvla on 2 September and joined the division.

[15] However, the dismemberment of the division began almost immediately as units were posted to the Western Frontier Force or to various other commands.