The intro art for the aborted Arc Two of Fallout Equestria: New Pegas. Arc One introduced the factions struggling for control of New Pegas and its weather-control tower (amongst other things). Arc Two would have introduced the REAL threat to everyone in the region: an underground colony of Diamond Dogs which had spent the previous two centuries building an industrial steam-based empire without revealing themselves.
 
Seeking vengeance for how ponies had treated the Dogs during and preceding the Great War, as well as wanting to become a world power in their own right, they now move into the light piloting giant mechanical war machines, driven by talisman-powered steam engines…