Centuries ago, Clover the Clever recorded in her personal diary the events surrounding the origins and early lives of Celestia and Luna. Now, thanks to the princesses' gracious consent and the scholarship of Twilight Sparkle, this account may now be read by modern Equestrians.

The Vault Dweller. The Chosen One. The Lone Wanderer. The Courier. The Sole Survivor.

What do the most deadly and influential people in the post-apocalyptic remains of the defunct United States of America have in common, besides being human and living in the same Universe, albeit at different times?

Why, they're being brought into Equestria by a veteran time-traveler!

(A Fallout Series/My Little Pony Crossover)