User blog comment:Supahbadmarine/Canon Policy Discussion 2:Empire and Xenos/@comment-2253300-20131108075946

Regarding the topic of the size of an Interstellar empire I feel that it is important to keep them small for the most part. It's only recently that a number of the less powerful Xenos and whatever else is out there has managed to expand in any kind of meaningful way. The most notable example of this is the Tau Empire which has been stated to have around a hundred world under their dominion. I feel that for a fanon Empire to exceed this size by a great deal would be one, impractical as such a force would become a major target for the Imperium, and two is a bit boastful is it implies greater success than the Imperium chief political rival at the time. I think that no standard Empire should have more than 150 worlds under it's command. it should also be noted that having just a handful of systems under your control is considered to be a farily substantial empire in the setting anyway.