'Operations: British Front east of Bapaume 6th September 1918. For conspicuous gallantry and devotion to duty. On the 6th September Corporal Marshall's platoon Sergeant was wounded on reaching his objective. Corporal Marshall assumed command of the platoon and established a line of posts in touch with the enemy. He also made personal reconnaissance of the ground to his front, going forward with one man a distance of 1,000 yards to ascertain that his flank was clear. During the whole of this time he was exposed to heavy machine gun fire from two sides. On the 7th September he was sent to establish a Lewis gun post on a ridge some 600 yards in front of our trench and finding it possible to push on he established his gun a further 600 yards out at the foot of the forward slope, going forward with one man to reconnoitre the further ridge with a view to moving his gun further forward should he be ordered to do so. In doing so he ascertained the position in which the enemy was placing his guns, and was able to give information of the movements of the enemy.'
Source: London Gazette
Date: 11 February 1919