#base_of_operations__base  installation from which a military force initiates operations; "the attack wiped out our forward bases"
  supertype:  #military_installation  any facility servicing military forces
  subtype:  #air_base__airbase__air_station__airstation  a base for military aircraft
  subtype:  #army_base  a large base of operations for an army
  subtype:  #firebase  an artillery base to support advancing troops
  subtype:  #navy_base  base of operations for a naval fleet
  subtype:  #rocket_base  a military base for rocket missiles

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