No. 85 Squadron was formed at Upavon on 1 August 1917; the station was home to the Royal Flying Corps Central Flying School. Shortly afterwards, the squadron moved to Mousehold Heath near Norwich under the command of Major R A Archer. During November 1917 the squadron transferred to Hounslow Heath Aerodrome, and in March 1918 Major William Avery Bishop VC, DSO, MC, took command and carried out his orders to prepare and train for front line duties in France. On 1 April 1918 No. 85 Squadron was transferred into the newly formed Royal Air Force. Following this period of training the squadron deployed to France during May 1918. Equipped with the Sopwith Dolphin and later the Royal Aircraft Factory S.E.5A, it flew fighter patrols and ground attack sorties over the Western Front until the Armistice was signed.