This is not the Fallout world Kkat created
Death... death is all we know.

A thousand years ago, Celestia's hoof was forced. Her sister had grown jealous and sought to end the world with an insane plan. But the banishment wasn't the end. With the power gap in Equestria, their enemies saw the perfect opportunity to attack. Celestia and her armies fought back as best they could, but with the Elements of Harmony disappearing, her options were few. Millions died, but with an attack on multiple fronts, the ponies were pushed to the brink of extinction. As a last, desperate attempt to keep her ponies from being eradicated, Celestia confided with her most powerful mages and developed an immensely powerful weapon that ended the war, driving off the invaders that weren't outright killed.

But the spell had a side effect. It bathed the land in a toxic radiation, rendering much of Equestria a dry, barren wasteland. The war is long over, but a mysterious enemy threatens everypony. Unknown in name, and intentions, they use Changeling spies to abduct and replace ponies, and even gryphons. Whether the Equestria Wasteland knows it or not, there is a war going on.

Because War...

War never changes.