https://theculture.fandom.com/wiki/Command_System https://theculture.fandom.com/wiki/Command_System > And of course to defeat such underground networks you ne

https://theculture.fandom.com/wiki/Command_System https://theculture.fandom.com/wiki/Command_System > And of course to defeat such underground networks you need vast armies of small intelligent drones that can go in there and explore every tunnel where no human wants to risk setting foot in. In the book they're defeated by biological warfare.