Basic idea, some nation from outside of Equestria has decided to invade. Then you have to fight them, I think the rest is self-explainitory.
I'm in maybe some sort of draconian or griffin race that would be cool having discords race battle ponies.
Hmmm this could go well with what I have designed for my main MLP fanfic in which an enemy of Rashall's, the one who destroyed his home, looks to invade Equestria.
