User blog comment:IamJakuhoRaikoben/Chapter 439: Albareth Empire, Review./@comment-24784846-20150608211418/@comment-5303512-20150608221033

Well don't forget humans that can serve as soldiers as well. If they only have around 7300 soldiers to invade Ishgal, that would likely have to take a lot of effort to cover all the land mass. Also since they are separate from Ishgal, there might be not a lot of information of their guilds, for all we know they could have 100 Fairy Tail like Guilds or even more.