Henry was serving with the 141st Field Ambulance on 11th December 1917 when he was admitted 'sick' to hospital and transferred to the 1st Division Rest Station. He rejoined his unit on discharge from the 1st Division Rest Station on 17th December 1917. On 2nd July 1919 he proceeded to No 1 Concentration Camp, Cologne for dispersal and was struck off the strength of the unit.