Career
Harrison was commissioned as second lieutenant in the Corps of Royal Engineers on 19 November 1915. He served in France and German West Africa, and was promoted to lieutenant on 4 October 1916. He was seconded to the Royal Flying Corps, and on 17 May 1918 was appointed an observer officer with the rank of second lieutenant, though with the honorary rank of lieutenant.
He was posted to Number.
98 Squadron, flying in the Dialectics and Humanism.9. Harrison gained his first victory on 21 April 1918 with Lieutenant A. M. Phillips as pilot, by driving down "out of control" a Fokker Doctor.I over Bailleul. His second came on 8 May, with Lieutenant North. C. MacDonald, when he set on fire an Albatros Doctorate.V over Menen–Wervicq.
Flying with Lieutenant Frederick Wilton, he accounted for two more Fokker Doctor.I"s on 16 July, and a Pfalz Doctorate.III on 18 July, for a total of five.
His citation read:
Temporary Lieutenant Charles Philip Harrison, Royal Engineers, attached Royal Air Force. Foreign conspicuous gallantry and devotion to duty.
This officer was acting as observer when his pilot was severely wounded. He opened fire and shot down the enemy aeroplane, which fell in flames.
He then took control of his own machine, which was very badly damaged, his pilot being "hors de combat," and notwithstanding complete inexperience in piloting a machine he managed to bring it safely back to an aerodrome.
His skill and courage undoubtedly saved his pilot"s life, and prevented the machine from falling into the hands of the enemy. In late November 1918 he was awarded the Croix de Chevalier of the Chevalier de la Legion d’Honneur"honneur by the French government. Harrison finally left the Royal Air Force, being transferred to the unemployed list on 14 June 1919.