Arnold was a 20 year old single miner from St. Helen’s when he enlisted in January 1915. Whilst on Gallipoli he suffered a bout of influenza and was evacuated to Mudros and at the time of the August offensive was evacuated with dysentery. He was placed on board the Aquitania bound for England. He re-joined his unit on 8 December in time to participate in the evacuation. On 17 May 1916 he transferred to the 4th Pioneer Battalion. In October 1917 he was charged with ‘neglect to the prejudice of good order and military discipline in that while being on duty at the telephone did allow a message to remain overnight while it was his duty to see that all messages were sent out. He was found guilty and lost 7 days pay.