What world do you think Silas is going to at the end? He mentions that he has people to protect and that there may not be much left of the world?

He explains he is part of the Honour Gaurd, who protect the boarders of worlds. Do we know more about the Honour Gaurd?

I think he means the world(s) outside of the cemetary, and that there might not be much left of his original home nation (due to wars, cultural changes, etcetera).