Reincarnated as the Villain's Sister - Chapter 86: Because you’re Hello Kitty.

This is a story about a graduate student of ancient Chinese who was repeatedly trampled on the road to employment, and returned to the middle of the Ming Dynasty and entered the body of a young child in a mountain village. There are many disputes in the farmyard With a dull father, a fierce mother, and a group of extremely bad relatives. Fortunately, we have thousands of years of historical accumulation, the Four Books and Five Classics, and the Eight-part Essays, and the majors are also suitable. Who says that it is difficult for a poor family to produce a noble son? The national strength has risen, and the rule of law has been relaxed; the law and discipline are lax, and the official discipline is lazy; there are a few treacherous ministers, and there are also some Japanese pirates; but overall, it can be said that this is a fertile ground for the free growth of scholars and officials. A legend of the rise of a poor family also grew from here

If an ancient scholar searches through the mists of history, he or she will find such an existence:Pope of the night,Angel of the Creator,The hidden emperor of the empire,…He is also the perfect mentor;Wanmen’s guidance,The original source of pain...No one knows where he came from, only that he was born with knowledge and has been with him for years.Let us chant his honorable name together:Spirit of truth, pure man, master of dreams, supreme beyond all eternity

Alexander was the greatest tyrant in history. His cruel, brutal and vicious reign struck fear in his enemies and allies alike. But that all ended when he was betrayed by his own people and beheaded by his archrival. As Alexander’s consciousness faded away all he could think of is all the faults he made, how he could have avoided them, how unlucky he had been, and his wrath and unwillingness to die at the hands of the man he hated most! But unexpectedly he was given not only the answers to these questions, but also a second chance to right all his many wrongs.

A scientific genius named Thomas Harrier was transmigrated to an imperial prince body after a car accident that took his life. He found out that he is in a world similar to our own with a timeline akin to early twentieth century. The body that he is occupying was the imperial prince of a failing empire who suddenly rose to power after a successful assassination attempt of his father. Unaware that the attack is just the beginning of what is to come. He faces many challenges throughout. Will Thomas Harrier be able to live his second life in peace while running an empire and getting it back to its former glory? Or will he succumb into a conspiracy lurking within the country's borders?

Expect some:

Cold war era techs.

Super battleship with advanced electronics, propulsion, and fire control systems?
Helicopters?
Missiles?
Modern medicines and equipment?
AC-130?
A nuke?
Challenger or Abrams or Leopard?
F-4 Phantom or MIG-21?
Colored TV's.

Everything!!!

PS. Cover not mine, I just found it on google.