Nathaniel nods. "Exactly. They won't even tell us who exactly we're supposed to be fighting, or why it was neccessary for them to bring so many people here to help them."

That's extremely unsettling to Nathaniel. If they need this many people on their side, then their enemy must be pretty formidable. Not that he's afraid, exactly. Just that he likes to know what kind of danger he's getting himself into ahead of time.