War had ravaged Equestria, forcing it back into the Dark Age. Nations fight for power while killing themselves in the process.
New technology is the way forward, and new tactics are the future, but the more forwards they go, the more closer they are to extinction.
This universe is doomed, ever since a rainbow maned filly was struck by a dimension hopping maniac during a race.

"Some worlds flourish, and others are left for dead."

Follow Rainbow Dash, Flash Sentry and Soarin as they live through the horrors of the great Equestrian war.
(This story is my idea of how the "doomsday" timeline in the season 5 finale came to be.)