Good work with the TL as always!
Seeing as Yuiner's bringing rifled muskets into play, I wonder how far he's gonna take his knowledge? Not anything too crazy like tanks or mechanization as that would probably be too big of a leap, but something small. Literally. Like maybe the Minié ball for instance? Those tiny fucks have better velocity than regular musket balls and are also capable of absolutely fucking someone up. But if the manga really did go that direction... I'd hesitate to see just what those wounds would look like in manga form.