Swiftsure was relieved as East Indies Station flagship by the armored cruiser later in February 1915 and transferred to the Dardanelles for service in the Dardanelles Campaign. She joined the Dardanelles Squadron on 28 February 1915 and took part in the attack on Fort Dardanos on 2 March 1915. She and Triumph were detached from the Dardanelles on 5 March 1915 for operations against forts at Smyrna and returned to the Dardanelles on 9 March 1915. She participated in the main attack on the Narrows forts on 18 March 1915 and supported the main landings at West Beach at Cape Helles on 25 April and subsequent landings, including the attack on Achi Baba on 4 June. On 18 September, a German submarine unsuccessfully attacked her while she was on a voyage from Mudros to Suvla Bay. She took part in the bombardment of Dedeagatch on 18 January 1916.Burt, p. 275
