A Javelin to Strike at the Core

I know I do a lot of dimension crossing fics but this was one I was working on since I first saw the anime back in 2011. Anyway, the story here is that a Freelancer gets tossed into the Strike Witches world after a relic opens up and sends him there. While in this new world he joins up with a few legendary squads to fight back against the Neuroi. And hope to a few others.