On 10 May 1917, Percy Kyme Hobson joined the Royal Flying Corps. Posted to 84 Squadron on 22 October 1917, he scored 7 victories flying the S.E.5a.
Military Cross (MC)
T./2nd Lt. Percy Kyme Hobson, Gen. List and R.F.C.
For conspicuous gallantry and devotion to duty. Observing a large body of troops with transport, he descended to within 200 feet, and, despite very severe enemy rifle and machine gun fire from the ground, dropped four bombs, three of which were direct hits on the transport, causing severe casualties, which were increased by the accurate machine gun fire brought to bear on his target. On a later occasion, he observed a large body of troops moving across the open, and attacked these with bombs and machine gun fire, causing many casualties and scattering them in all directions. He has been responsible for the destruction of four enemy machines, and has at all times shown a complete disregard for personal danger.