MTL - The Villain Has Blackened Again - Chapter 1117 Rescue, Wan Junyue

Skyseal Emperor Gu Taxian is perhaps the greatest Emperor in all of history. He crushed the Hundred Empires and brought them to heel, built the vast Great Stone Wall to keep out the deadly wilders, relocated mountains and rivers to promote commerce, set up roads and highways, and even promoted free academies of learning for the common man in an attempt to uplift them. But the Skyseal Emperor’s ambitions involve more than just this – he is preparing to launch a great campaign to stamp out all pagan religions, wishing to allow all men to become like gods instead of merely worshiping them. Deities, demons, and immortals alike tremble and rage at the Skyseal Emperor’s ambitions.

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.

In this world, there are those that are fortunate and those who are not.

Ethan Bellrose is neither; he is cursed. At nineteen, he has lived his entire life sheltered in his home as his fragile body blisters under sunlight, breaks under the slightest impact, and falls to any sickness.

However, the arrival of a world-changing digital service catches the hopeless young man’s eye: “Reincarnation Online”--a virtual reality experience that gives a new fantastical life to those who are unfulfilled with their current path.

For Ethan Bellrose, the choice is simple. Without hesitation, he orders the virtual reality headgear, choosing to abandon his current life and live forevermore in the world of fantasy, magic, and endless adventure–”Arcadius.”

Though what he finds is a world not full of leisure and trivial triumph, but a world just as alive and full of darkness, glory, and grandeur as Earth–if not greater.

Starting from square one as an infant, given a new name and family, this is the eventful life, full of dreadful lows and exhilarating highs, of “Emilio Dragonheart.”

[...Booting System…]

[Welcome to Reincarnation Online.]

[You will henceforth by the recipient of the Dragonheart System.]

[Please, enjoy your stay.]

Transmigrated to become a disciple of the demon sect, relying on the technique modifier to become a giant of the demon path.

[Detected the technique “Blood Nerve”, relying on devouring blood to cultivate]

[Side effect: easily affected by the spirit contained in the blood, becoming bloodthirsty, murderous, insane, and even brain dead]

[Please wait, system modification is in progress…]

[Ding! Modification completed and side effects canceled]