Celestia nodded, but she knew it was more to do with Faust than the Mareitanians. Thorax had made it pretty clear that any invading army would have a pretty terrible time of it, so that negated the need for defences, and yet they were being built to stop ponies on hoof, which Faust wasn't, unless Chrysalis' throne could negate her magic too. Chrysalis really wanted to keep the Mareitanians out, or did she? What if she was stopping the refugees from going south instead?