MTL - Wild Malicious Consort: Good For Nothing Ninth Miss - Chapter 47 Wisdom of wisdom

After death, Gu Jin realized the child, whom she had fed only once in the past, was the only person who gave her proper burial and avenged her by any means. Once she’s reborn, she found him when he was being bullied. And despite objections, Gu Jin took this malnourished child under her care with help from the dimension in her possession. However, never did she expect she would lead him astray...Many years later, Gu Jin can’t help gritting her teeth as she is watching the elegant and handsome man on TV. He has grown up to be a successful and powerful businessman who is outwardly kind but inwardly ruthless. Most unexpectedly, he has turned into a man who is domineering and protective of her.

In the foreign world, the martial artists dominate the world and the sword of the emperor controls the fate of hundreds of millions of lives! Long Yu, the number one killer on Earth, after dying, takes rebirth in this new world in an aristocratic family of martial artists but faces rejection because he is unable to practice martial arts.

- Description from Novelupdates

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.

The most successful businessman of his time, who started from being a homeless orphan, died indignantly because of being plotted against by his most trusted aid, his own brother.