"Girl--this, this is war."
After being reborn and becoming a magic wielding soldier in the Imperial Army, Tanya Degurechaff bemoans her fate of being placed at the very edge of the front lines instead of a comfy place in the rear. Swearing revenge on Being X, she plunges head-first into battle, dragging her subordinate along with her!
This one follows up all the way to V1 rockets. More details and battles in between that were never mentioned in the anime.