Henry arrived in France on the 13th September 1914. He was attached to the 2nd Bn. York and Lancaster Regiment when he was awarded the Distinguished Conduct Medal "For conspicuous gallantry and good work throughout the Campaign, notably at Hooge on 9th August 1915, when he gave great assistance to the Medical Officer under heavy shell fire, and when alone in the trenches worked hard all day tending the wounded and dressing their wounds." Henry was awarded the Bar "For conspicuous gallantry in action. he tended and brought in the wounded under very heavy fire, displaying great courage and determination. Later, he organised and accompanied a search party."