The battle between the Solar Empire, the New Lunar Republic, and the Legion of Discord will be settled once and for all... In the skies above Equestria.

This is a poster for a fictitious Ace Combat game.
As for how this game would work: I came up with 2 scenarios. One is a 3 way battle to the death, winner rules over Equestria. You can play as any side (like the C&C games). The other is you can start as either the NLR or SE, and at first all 3 sides are fighting each other. Towards the end it's discovered Discord was behind the entire thing, including getting the NLR and SE to fight each other to make it easier. And both sides team up to bring down the LoD. Failure means the destruction of Equestria.

The NLR uses American and Russian planes, the Solar Empire European and Russian, and Legion of Discord all Russian plus the J-10. And of course all sides have the AC exclusive aircraft like the Wyvern and Morgan. Plus each side has one exclusive plane. With the NLR it's the FA/29 , the SE and LoD I haven't figured out yet.

Oh I picked the name "Legion of Discord" because the other name "'Order' of Discord" just doesn't sound right.