The Solar Empire and the Lunar Republic have existed in complete isolation of each other for over a thousand years. The might and order of Princess Celestia ensuring the expansion of Equestrians throughout the stars. After the death of First Admiral of the Everfree Sector, Celestia sends the young and inexperienced Twilight Sparkle to take command of the HMS Ponyville and defend the Solar Empire against the machinations of Nightmare Moon. Though all is not what it seems...

...or what happens when the Author combines Battlefleet Gothic 40K/the Honorverse/Sins of a Solar Empire/Sword of the Stars/various space pony art in his head and he absolutely has to get it out. HUMAN PONIES.