[quote=@Lauder]
I have 9 fully populated planet... Which would be 162 billion ravenous creatures. 7% of those would be around 11 billion soldiers. Huh. Smaller than I imagined
[/quote]

If you want it to be bigger, you can have a few colonies here and there that aren't fully populated. 

I think it makes sense that most planets wouldn't be fully populated, because it takes a lot of time for that many people to be born :lol

If you want your nation to be bigger or something, just say you have like 5 "buffer" colonies on the outskirts of your territory, which aren't fully populated with 18 billion each but provide a layer of defense.