It is the year 2181 SSC.

For the past millennium, the small and technologically-advanced Equestrian Empire has waged war against the old and corrupt Cleomanni Confederacy, fighting desperately to secure recognition by the Free Trade Union, whose discriminatory policies exclude non-bipeds from the political process.

The Equestrians employed weapons of terrifying might in their struggle. Quad-walkers that fielded the firepower of an entire artillery battery. Magical codices potent enough to turn entire cities to molten glass. However, it wasn't enough. They failed. One by one, their worlds fell to the cleomanni and their numerical superiority, until the satyrs reached Equestria itself and remorselessly bombarded Everfree City and its gleaming spaceports into dust.

Three years hence, Sergeant Desert Storm, a former charger jockey, chafes in captivity, subjected to unethical experiments on an ongoing basis, with even the most basic of legal protections denied to her. However, she is not alone. Even when all hope seems lost, there are ponies willing to rise to the challenge and overthrow their oppressors.

In an era where friendship and harmony are naught but a bittersweet memory, the soul of a defeated nation cries out for one thing, and one thing only; revenge.

Cover art is by the amazing 1Jaz: https://www.deviantart.com/1jaz