[quote=Assallya]Hmmm... Well, how about it being a Sith Empire that encompasses most of the galaxy. That way the Jedi would be part of a rebellious movement and won't have fleets to bring to the aid of Earth.[/quote]

Yup, that would work. It will also keep it a personal RP too. So any Sith could possibly also be renegades and wanting to avoid the notice of potential competition so to speak.