A World of Bloody Evolution [RWBY/Warhammer40k]

[MrTerrorist]

Plot:
As the 41st millennium draws to a close, Yang Xiao Long appears in the Imperium of Man, lost and bereaving the death of her sister. Unending war and horrors the likes of which she's never known await...

This is a unique crossover fanfic written by RedrumSprinkles. It's a great fanfic by her and you might enjoy it if you like Warhammer 40k and RWBY.

You can read it at Fanfiction.net, Space Battles or Sufficient Velocity.
Also, it has it's own TV Tropes page as well!