From the 8th Circle of Hell
Down in the dark, dreary deapths of hell, in the very deepest circles of hell, where only the most crooked and disgusting of souls reside, only the most powerfull and deseprate of demons can survive, and if they don't... they just get reborn back into hell. Nobody can escape.
That is, unless you join the military, and get to go out on the frontlines and battle angels and humans alike! On Earth, all your demonic nightmares can come true!
And this is exactly what Arthur, a relatively weak and unassuming demon from the 8th circle of hell decides to do. And since demons from the lower circles of hell are seen as badasses, he gets to join the military, no questions asked! And here begins his journey to get to Earth and serve the good Lord in any way he can, even if he has to spill some blood and take a few lives!
If only he wasn't so queasy about blood...