Military_structure.
association Military_vehicle.
association Situational_awareness.
graphic http://www.lastrefuge.co.uk/data/adrian2.html [hill_fort_hod_hill.jpg]
has_type Castle.
has_type Hill_fort.
has_type ICBM silo
has_type Trench.
   
 
Vr.155, Dec 2010     Readme      List of Objects ..