Fighting Japan: The Astartes Have Arrived to Help

I transmigrated from Earth into the world of Warhammer 40,000 and was lucky enough to become an Astartes. On a mission, our ship had just entered the Warp when we ran into a Warp storm. It sent us back to Earth during World War II, right into Longguo.

"Oh, these vile beasts are even more disgusting than the things in the Warp."

"Oh, Emperor above, let me cleanse the souls of this trash, rejected even by the creatures of the Warp, with my chainsword and bolter."