The "emperor" mechanic is obviously a gamified thing, not meant to be canonical...
It's the same way that all PvP-only zones work in MMOs -- a zone lost to time, existing in its own state of perpetual war. I'm seeing this like the big WoW battlegrounds, but if you're DA BEST, they give youa cape or a mount or something.
MMOs need a LOT of content, so having everything tying directly to canonical moments would be... kind of dull, honestly.
I think everyone here is mostly just being tongue-in-cheek about this, but I just thought I would make this clear.