During the First World War, 34 battalion-sized hutted garrisons were built for use by all types of military forces. A light military railway line was built from the established Amesbury–Bulford line, to carry troops to Larkhill and on to an aerodrome at Stonehenge. After the war, the garrison became an artillery domain and in 1919 the Royal School of Artillery was established there. The light railway was lifted and Stonehenge Aerodrome was closed. However, several other new facilities were established in the interwar years, including a military hospital, married quarters at Strangways, a NAAFI service and military churches. The famed British Ordnance QF 25-pounder was developed by the school of artillery shortly before the outbreak of the Second World War.