Deversoir Air Base (LG-209) is a former military airfield in Egypt, located approximately 19 km south-southeast of Ismailia (Al Isma`iliyah); 116 km northeast of Cairo It was formerly a major Royal Air Force airfield known as RAF Deversoir built before World War II. During World War II, it was used as a military airfield by the British Royal Air Force and the United States Army Air Force during the North African Campaign against Axis forces. USAAF Ninth Air Force units which used the airfield were: