The dismounted regiment embarked at Alexandria aboard the "Caledonia" on 14 August and sailed for Lemnos where it transshipped to HMS "Doris" and continued to Suvla Bay where a fresh landing on the Gallipoli peninsula was under way. The regiment landed on the morning of 18 August and went into reserve positions at Karakol Dagh. It moved to 'C' Beach, Lala Baba, on 20 August. On 21 August it advanced to Chocolate Hill under heavy fire and took part in the attack on the Turkish positions on Hill 112 (the Battle of Scimitar Hill). The Yeomanry brigades advancing in squadron columns 'presented such a target as artillerymen dream of' and suffered heavy casualties as they 'stumbled blindly forward into battle'. The 1/1st CoLY reached Green Hill and occupied the trenches there, finding them 'chock full of dead and dying' from the earlier attack by 86th Brigade. It was ordered to retire during the night and the survivors were back at Lala Baba by 04.30.