History of Sussex airfields around Sussex. During the lead-up to the D-Day landings, the people of Sussex were witness to the build-up of military personnel and materials, including the assembly of landing crafts and construction of Mulberry harbours off the county's coast. Five new airfields were built to provide additional support for the D-Day landings, four near Chichester and one near Billingshurst. A legacy of the D-Day landings are the sections of Mulberry harbour that lay broken and abandoned on the sea floor off the coast, of Selsey Bill, having missed the invasion. Sussex was an industrial county, from the stone age, with
390th Strategic Missile Wing On 25 May 1944, a detachment of the group was directed to bomb coastal defenses in France using radar, despite weather conditions that were ideal for visual bombing. Although crewmembers were not advised why radar bombing was directed, this mission was a test to determine if pathfinder operations would succeed if the weather over Normandy was foul when the invasion took place. Thereafter, the group would frequently use pathfinder techniques when clouds obscured its assigned targets. The group bombed the coast near Caen fifteen minutes before the D-Day landings in Normandy on 6 June 1944. It attacked enemy artillery in