The phrase refers to “territory of the underground empire” translated into English. It describes the domain or lands controlled by a hidden, subterranean civilization. For example, one might envision a sprawling network of caves and tunnels, populated by a unique society, as constituting its territory.
Understanding the concept allows for detailed exploration of fictional settings and narratives. It provides a framework for examining societal structures, resource management, and political dynamics within such a concealed realm. Historically, stories of hidden worlds and civilizations have captured the imagination, offering social commentary and escapism.