Airships sizes

So to explain why they move around with so many people/as such a large group. Truth be told the military division's warships are only called airships in one sense of the word, they're more akin to cities.

And to move such a gigantic structure requires a lot of manpower. The more people you command, the stronger/the more power you wield, with the downside that you're responsible for providing for a lot of people

Vol.2 Ch.324: 44F - The Last Station: Evankhell (2)