User blog comment:BeastMan14/As A Galaxy Burns... The Reapers vs The Empire!/@comment-5138827-20121205042331/@comment-422690-20121207124825

@Anon: given a few variables, we can figure out how long it would take.

And keep in mind that the Rebels and Ewoks had something on their side the Empire didn't: George Lucs. (you could also go into the whole will of the force stuff, but I'm short on time.