[@WilsonTurner] That is true, but consider the fact that Brittania is a surprisingly wealthy country. The queen literally GIVES whole districts to poor people for free. That and the fact that an army of suits controlled by specially trained military personal with reaction times approaching precognition, I don't exactly think a squad of marines can deal with a robotic suit that doesn't require human life to be wasted. That and they can be mass produced with the only effort coming from the weapons and electronics. A squad of 20 could easily wipe out a squad of 60-70 men if they are piloted by even 2nd ranked pilots. Remember that the technology would also likely be already publicly available, so Brittania would be hard at work creating a newer version, since the current is only the 1st generation. 

Since Dee's kingdom is the most technologically advanced I can always change it if it's too OP, but being a close second/third would definitely have some powerful tech. Since nukes would be outright banned in pretty much everywhere, the only choice is to develop powerful war weapons that don't require soldiers to be out on the fields fighting, even if we still do that. Because they can only produce so many the army is still being developed, with the King on the front lines during most battles. We aren't a Jack of all Trades nation for nothing :3

EDit: I just read Haleys post. Thats a thing. We aren't warring, but it is nice to know who you can rely and what the relations between military nations might be.