Another dime a dozen shitty Isekai to throw onto the pile. Was it really so hard to just make it a story about a child prodigy like Peter the Great or Lelouch who took knowledge from old books and new technological developments from neighboring countries to then implement it in his own with great results? The author is already making it take place in the Byzantine empire a couple years before the turks burn it down, just with elves thrown into the mix. A waste of a translation effort.