[quote=@Cyclone]
Add to that list that Ceres has submarine dreadnoughts, Avalia has air dreadnoughts, and Moravia has tanks and artillery so massive that you could call them land dreadnoughts. So a few nations have really big war machines.
[/quote]Well, while my supreme airship is far from a dreadnought it's still probably the single largest vehicle in use.
They are 542m long and filled with 4 million cubic meters of kavuria in nearly hundreds of thousands of gas chambers.
Albeit aside from the advantages gained from its size the Ylweran isn't such a threat. Granted that alone is enough. Since their creation three decades ago absolutely none of them got taken down. They are just too big in general.