Legend of the Great Saint - Chapter 18

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.

An eternal prison, a soulless body, a sealed spirit, everything lost.

To resign before merciless fate, or to become destiny!

“I lived in an illusion, I was lost, I could not find my home, I did not have a home… but why does it matter?! Between bowing to the threat of death and a spine that would never bend, I will choose the latter!”

- Description from Novelupdates

Despite being the ruler of a nation, nobody was willing to marry the vicious man with a bloodlust.

Gods and demons are everywhere in the Grand Desolate World.