After the Legion's offer of the services of two squadrons of horsemen was rejected by the New Zealand government following the outbreak of the First World War, Twisleton enlisted in the
New Zealand Expeditionary Force. He was assigned to the Otago Mounted Rifles Regiment, with which he landed at
Gallipoli nearly a month after the
Landing at Anzac Cove on 25 April 1915. As a lieutenant, he continued his letter–writing habits of the Boer War, regularly describing life in the trenches in correspondence home. As with his previous writing, British officers were often the subject of criticism. He was awarded the
Military Cross for his services during the
Gallipoli Campaign, which saw him involved in the
Battle of Hill 60. He became ill with dysentery and was evacuated from Gallipoli in September 1915. He is buried at Ramleh War Cemetery, in Israel. After Twisleton's death, the Legion of Frontiersmen recognised his services with the Pioneer Axe, its highest award. His widow was made an honorary lieutenant of the Legion. ==Notes==