The Cairo–Baghdad Air Route was an airmail route established by the Royal Air Force following a conference of British military and civil officials held in Cairo in March 1921. The aim was to create an air link between Egypt, Mandate Palestine and British Mandate of Mesopotamia, which were under British control following the end of World War I. The western end of the route was the airfield at Heliopolis, on the outskirts of Cairo. The eastern end was at Hinaidi airfield, just south of Baghdad. It was intended the route would eventually extend to India. In 1921 A L Holt was involved with creating the track across the Syrian desert from Baghdad to the eastern edge of the basalt desert in Jordan, which was to act as a guide track for the pilots of the Cairo – Baghdad air route. The route was opened on 23 June 1921 and the first mail was carried on 28 July 1921. The aircraft used were RAF Vickers Vernons, twin-engined biplanes were capable of carrying up to seven passengers and mail, but, for longer endurance, usually carried a smaller load. Initially the price of mail was 1 shilling an ounce, but as the route became established this was reduced to 3d. de Havilland Hercules G-EBMW was used on the route The route was 866 miles long and comprised two sections. The Western third was mostly over the well populated coastal plains between the Nile and the Dead Sea, where there were plenty of landmarks by which to steer. The Eastern section was over the Jordanian and Iraqi deserts, uninhabited except fornomadic tribes and with few landmarks. A visible track over this part of the route was laid across the ground by the wheels of an armoured car driven for this purpose, or by a plough pulled by a Fordson tractor, depending upon the nature of the terrain. 26 emergency landing grounds were made in the desert, several of which included spare tanks of fuel. In 1926 Imperial Airways took over the route from the RAF. Using three-engined de Havilland Hercules aircraft of greater range than the Vernons, the route was extended first to Basra and then to India, as part of an air passenger service.
