The Empire of Hzaka is on Allaria. Which is located roughly 2~3 weeks away by difficult sea journey.
Though I've deliberately not defined it; I saw it as a massive warmarchine. If it were near Daunton (i.e. not blocked by a significant expanse of the Transitive Seas) it would already have conquered the city.
The problem to my mind, for Hzaka, isn't that they don't have the resources to can't invade and control the whole world, it's just that the logistics of getting troops to the right places has so far not been solved.
Gotcha. That makes more sense to me. Close enough for PC's who desert from Hzaka to show up in Daunton, but not close enough to transport and land 10,000 troops in Daunton.