An officer in the Royal Army Medical Corps, he served on attachment to The Sherwood Foresters during the First World War.

[2] The early part of his military career was spent attached to the South Staffordshire Regiment as a medical officer before being transferred to the Field Ambulance.

[3] He was later posted to the Sherwood Foresters with which he went to France as part of the 46th (North Midland) Division, which fought in the Battle of Loos in September-October 1915.

[1] His brother, Second Lieutenant Edward Alan Green, who was serving in the 1/5th Battalion of the South Staffordshire Regiment, also part of the 46th Division, was killed in the battle.

Beginning its advance at 7:25 am, the Sherwood Foresters had great difficulty moving forward due to heavy machinegun fire coming from Gommecourt Wood.

Under heavy machine gun fire, Green extracted Robinson to a nearby shellhole and performed initial treatment on the wounds before carrying him back to British lines.

Green is also remembered by plaques at Felsted School and the Royal Army Medical Corps College in London.