Equestria: a millennia-old world divine diarchy with lasting peace, harmony, and prosperity for all its citizens. The United Mojave Republic: a young, democratic nation just now attempting to crawl out of the hell of the wasteland.

Two nations, all but opposite in nature, are set on a collision course across worlds. Tensions will arise, alliances will be forged and tested, and both nations will be changed, for better or for worse. But war...

War never changes.

(Characters added as it goes along.)