26 IV 1915 - 12.20pm: Arrived at Sedd el Bahr, Turkey
27 IV 1915 - 1pm: Brigade begins to disembark with the G.S. Wagons or Mules
28 IV 1915 - 1pm: Battery carries out disembarkation
29 IV 1915 - 11am: Battery concludes disembarkation
30 IV 1915 - 1pm: Came into action 1½ miles N.E. of Sedd el Bahr
6pm: Battery fired first rounds to register zone
1. V. 1915 - 6am: Fired on enemy's infantry
11.20am: Infantry in front of battery attacked and driven in. Battery opened fire at 12.15am and ? ? the action, firing until noon on 2. V. 15. Four men wounded, 4 horses killed and seven wounded
3. V. 1915 - 7pm: Withdrew into Bivouac about 1 mile SW, guns in position ready for action
5. V. 1915 - 11.30am: Major Rick rejoined after an absence of about a month at a time when many difficult operations had to be carried out. All these were put through without a hitch by Lieutenant Peveral.
6. V. 1915 - 7.30am: Advanced to new position 169Q, about 1½ miles N.E.
XV Brigade, RHA was formed at Leamington, Warwickshire in January 1915 and comprised of:
• B Battery of I Brigade, RHA at Ambala, India
• L Battery at St John's Wood Barracks, reformed after the Action at Néry
• Y Battery of XIII Brigade, RHA at Mhow, India
• XV RHA Brigade Ammunition Column
On formation, the batteries were re-equipped with four 18 pounders each. The brigade was assigned to the 29th Division. In March 1915, it embarked at Avonmouth and sailed for Alexandria (via Malta) arriving from 28 March?. On 7 April, the division began re-embarking at Alexandria and sailed for Gallipoli.
The division started landing at Cape Helles from 7am on 25 April and served on the Gallipoli Peninsula until January 1915. While at Helles, the division saw action at the Capture of Sedd el Bahr (26 April), the First Battle of Krithia (28 April), Second Battle of Krithia (6–8 May) and Third Battles of Krithia (4 June), the Battle of Gully Ravine (28 June – 2 July) and the Battle of Krithia Vineyard (6–13 August). From 16 August to the night of 19/20 December 1915, the bulk of the division served at Suvla but the brigade remained at Helles. On the night of 7/8 January 1916, the division was evacuated from Helles.