An MLP/Warhammer 40K Crossover, part 2.
Celestia has handed down her order. The Iron Warriors must be defeated and driven from the planet, lest the corrosive grip of Chaos infect their world. With great reluctance, Twilight and Company depart for the Iron Warriors fortress-factory in order to confront the Chaos Warsmith. However, in this mission it is not the might of the enemy that will be their greatest challenge, but their own burgeoning friendships with the admittedly less-than-saintly members of the 38th Company.
At least until the Iron Warriors actually consider them a threat. Then it's totally their military might that will prove to be their greatest challenge.
All the while, the Tau forces lick their wounds and plot their next move. They are far from defeated, and the Iron Warriors have little inkling as to the aliens' true purpose.
MORE EXPLOSIONS!!
(Dark humor warning; minor grimdark)
(Cover art by Nicholas Kay)
(This series now has its own TVtropes page!)
(This series is a contestant in the Tournament of Canterlot, a charity event to raise money for Syrian refugees! Go here for details and donations!)
MLP/Warhammer 40K crossover. Chaos Space Marines from the piratical 38th Company have engaged Tau forces around a planet rich with alien life, magic, and... friendship? I guess? Weird.
MLP/Warhammer 40K crossover, part 2. Twilight is charged with driving the Iron Warriors from Equestria and their world. But the Tau aren't out of the fight yet.
MLP/Warhammer 40K crossover, part 3. As relations between Equestria and 38th Company wax and wane, the Tau warriors of the Sept Lamman put the final phase of their plan into action.
MLP/Warhammer 40K crossover, part 4. The Tau have left, but now a new threat threatens to overrun Equestria and its home planet. This time, though, hope lay with the darker powers...
A series of short stories detailing the backgrounds of some of the pirates of the Iron Warriors 38th Company.
MLP/Warhammer 40K crossover, part 5. The pieces are placed. The battle lines have been drawn. The 38th Company and Equestria fight relentlessly against the alien menace (the other one, that is), but the odds are hardly in their favor.