MTL - Laws of the Other World - Chapter 79 Come to my side

Ludwig Heart, the heir to a vast fortune and a life of luxury, craves only one thing: freedom from his gilded cage. But when a plane crash catapults him into a world of magic and danger, he awakens not as the hero he dreamed of, but as a victim in a twisted ritual. Trapped between the ambitions of dark necromancers and the wrath of vengeful gods, Ludwig must navigate a deadly new reality where his life is no longer his own. Stripped of privilege and resurrected as an undead pawn, Ludwig’s fight for survival will determine whether he reclaims his destiny—or becomes a mere footnote in a world of shadows and deceit.

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.

Traveling through the fantasy world, after hundreds of years of tossing, Han Li, who is of mediocre aptitude, is ruined.

After going down the mountain to marry a wife, he found that the way he opened the fantasy world was wrong.

You can rise from lying down, why should you practice hard, fight and kill?

Many years later, a long-lived family quietly rose up, with tentacles all over the heavens and worlds, and behind the scenes they controlled the various holy lands and immortal mansions.

On this day, Han Li was high in the ninth heaven, looking at the billions of descendants below, telling his glorious history.

A fairy emperor came across the border, intending to destroy the Han family, but was killed by Han Li with a snap of his fingers.

Immediately, the heavens were shocked, that ancestor Han was so strong!

【Longevity Flow + Family Flow + Goudao Flow】

- Description from novelbuddy