The Solar Empire... It was less than six months ago that it was still known as Western Equestria. The invasion of the Changeling Nation broke Princess Celestia mentally, and she became Daybreaker, God Empress of the Solar Empire. They won the war against the changelings, but at what cost? Princess Luna defected in an epic battle with her now-tyrant of a sister, which destroyed Canterlot in the process, and caused her to change back into Nightmare Moon. And thus she created the Lunar Empire after escaping from the battle with her life. And in doing so, created a civil war between West and East, Sun and Moon, ...pony and pony. Friendships were both severed and forged, ponies and other species both separating and joining hands to stand on one side or the other, either with Empress Daybreaker, or with Empress Nightmare Moon.

But then there was the outliers, as there is in every situation involving two sides. Ponies and other species who either wanted no part in the war or the politics that came with it, or wanted to find a way to either lessen the casualties caused, or end it altogether. Every species who felt that way escaped Equestria and took refuge in the Crystal Empire, which had become a neutral ground. Princess Cadance, with Fluttershy's help, and at her request, formed an army of her own. The Peace Corps. A collection of ponies and other species alike who were serious about helping those they cared about that were or might become hurt or worse by the war, and that wanted to stop the war from the inside.