Category Nuances for civil_defense:

• practical,
• iraqi,
• governmental,
• military,
• internal,
• timely,
• key,
• underground,
• civilian,
• vital,
• armed,
• defensive,

Simple Categories for civil_defense:

• sector,
• organization,
• challenge,
• system,
• topic,
• force,
• body,
• building,
• activity,
• facility,
• unit,