Strike Witches universe, ground-breaking rocket striker units were developed, much faster, but with a strict weight limit- which means no clothes, no armaments... And no arms. Legs are cut mid-tigh as well, to fit them in the crammed units.
Command gives an order that every single squadron has to have a pilot compatible with the new unit for reconissance missions, a decision not met too warmly by witches. But order is an order, and our squadron sets up a real dogfight, the first one to go down will become the recon.
Of course, using real guns on real girls, what can go wrong? Most of them had the same idea, though- shoot off others' limbs, to say "Hey, I lost, but she's already halfway there". Needless to say, all of them got "converted" in the end.