NA Localization:
The Demon King who obliterated the strongest cavalry brigade in the Warring States period.
Her battle has changed so many concepts of "War," and brought revolution to the battlefield.
It takes time to reload, and the accuracy is questionable.
Guns will never be of value on the battlefield.
That was what everybody thought at the time.
"Then I just need to gather a whole bunch of them and fire away right?
...In waves."
And today, the Demon King has obtained another innovation.
By the way, although the name is confusing, it's a matchlock rifle modified by adding rifling to the barrel, and not a Gatling gun.
"What? There's something like that? I-I want it!"
Fan Translation:
The Demon King who destroyed the strongest cavalry corps in the Sengoku Era.
That one battle single-handedly revolutionised the very notion of warfare.
With their unreliable aim, and need for time-consuming reloading, firearms are simply not suited to the battlefield -
such was the common consensus.
"But if that's the case, why can't we just line up as many as we can and fire away? You know, in turns?"
――And now, the Demon King has revolutionised the firearm once again.
Incidentally, the name "rotary matchlock" is misleading; it is a matchlock equipped with a rifled barrel, rather than a gatling gun.
"What's that? A gatling gun? I-I want one of those too!"