Harry entered the war in France on the 25th July 1915. He was awarded the Distinguished Conduct Medal "For conspicuous bravery and devotion during lengthy operations, in leading and directing his stretcher squads in the open and under very heavy shell fire. On one occasion, when all his men were away carrying the wounded, he continued to dress and attend wounded during an intense bombardment of an hour and a half, one man being killed while he was in the act of dressing him". Harry was awarded the Bar "For conspicuous gallantry and devotion to duty. He was continuously in charge of stretcher bearers throughout the operations under heavy shell fire. He remained on duty day and night for a week, and showed great organising abilities and coolness under the most difficult conditions, setting a splendid example to all under him."