Equestria has always been a relatively peaceful land. This all changes in the 10th century after Luna's banishment, when technology of a long forgotten civilization are found in mysterious ruins.

This both brings prosperity...and revolutionizes warfare. One particular tool of war stands out-the tank. At first viewed as an oddity, it becomes the most important combat implement within the century, right next to the use of gunpowder weapons.

Equestrians are not the only ones to make these discoveries though-but this is the least of their worries. A cult of Nightmare Moon, a god of chaos, a rogue changeling swarm, a black-hearted king, and a mysterious entity only known as WG are among the challenges that the Equestrian military's newest addition will face.

*I do not claim ownership of any of things I linked. All sources go to their respective owners.