CRESCENT CITY 1. Can someone help me understand? I'm 1/3 through the House of Earth and Blood book and I'm having a hard time understanding world building. What are asteri? And the triarii? And what is the 33rd legion and the “Aux”?

I'm very busy. I don't quite understand how hierarchies are ordered and how houses are organized either. Someone explain to me, pleaseeeee! 😔