I did not see the start of this thread so probable cannot comment but from experience The Regiments in the Royal Artillery were titled "Air Defence Regiments" and were normally tasked with defending airfields with either ground to air missiles or in the case of the regiment guarding the facilities at Semengo Camp and Kuching Airport in 1962-63 60/60 Radar Controlled Bofors In 1982 in the Falklands they were defending the base area On Google the Australian Regiments of Artillery are also named as either Field Regiments or Air Defence Regiments and as they follow the R A format are tasked with the same roles Hope that helps Roger Royal Marines Member RMHS Researching Copelin, Attrell, Reeves, Deacon & Pont