For an age the five alicorn princesses lead Equestria in a time of peace and harmony. Then one day tragedy struck, plagues poured down from the mountains killing hundreds of ponies, magic went wild scorching the land killing even more and the princesses disappeared leaving ponykind adrift and leaderless. Ever since that day ponies had to constantly struggle to survive, constantly wavering on the the edges of death and madness. A thousand years have past and the once great civilization has fallen into isolated pockets of civilization. Few dare to stray far from the safety of the walls of their villages and towns as the inhospitable wilderness is plagued by monsters, mutants, roving gangs and wandering warlords. Most of the great cities are gone, long crumbled into dust, only three remain and none go there because of stories that they are haunted. The three cities are The Dead City on the mountain, The Wailing City of the North and Clouded City. Two other places none go are The Ruined Castle of the Cursed Forest and The Crystal Spire. Whatever happened to the five alicorn princesses, none are left whom knows. Over the centuries truth became conjecture, conjecture became myth, myth became legend. Among the surviving pony villages, there are lore keepers whom recount an old prophecy: "On the longest day of the thousandth year a goddess shall come from across the sea. She will heal the land, resurrect the six champions, reawaken the goddesses and shall restore harmony to the land." Rumors abound that a goddess leading a great host has landed on the shores across the irradiated desert, just beyond the kingdom of Sphinxes. Is this truly a goddess returned or just another bloodthirsty warlord?

This is inspired by Fallout and 40K, but not to be intended as a direct take from either.

Contains war, conquest, genocide, rape gangs, mass murder, slavery, dismemberment, bloody sacrifice, amongst other unpleasant things. Reader warning is advised.

Edit: Thank to New Rebellion for his help.