The Queen's Rise to the Top - Chapter 324: Shake It Up

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.

Seo-Joon, who had been working to save money in order to pay off his dead parents’ debt and attend a hunter academy, ended up needing to spend all his savings on a surgery due to an unfortunate accident.In his moment of despair, a weird advertisement played.[You can also become an awakener!]He decided to register since he had nothing else to lose.[Mr. Kim Seo-Joon, welcome to Transcension Academy.]This hunter academy is on a completely different ‘dimension’ than the rest!In the age of private hunter education, you can also become a ‘transcender.’

They love gold, and they love silver. Even more so, they love gems that dazzle, like stars across the skies.
Firearms, jewelleries, and precious metals; A collector’s world will not be complete without antiques.
Storage auctions, old goods trade, re-estate sales and gold-digging. But the truth is, if one wants to make money, then the supreme way is through searching for the legendary treasures.
Holding the fort, there’s an ocelot, a wolf, and an Andes condor. At the side, there’s a loyal hound, an irascible ape, and an African honey badger. Who said that you can only rely on humans when treasure hunting?!

All the people came to the Chaos Continent, became the lord of one party, and participated in the struggle for hegemony among all ethnic groups.

Tinder is the authority of the human lord. You can sign in on Tinder every day to get population, blueprints, food and other materials.

Huang Yu signed in on the first day and got a discounted artifact.

A batch of discounted products will be refreshed every day for Huang Yu to buy.

then……

“This legendary weapon is only 10,000 magic crystals after the discount? I bought it!”

“0.5% off dragon eggs? Give me 100!”

“0.0…01% off the extraordinary arms training camp! There is such a good thing? Come to the bowl!”

…

Since then, Huang Yu and his territory have become famous in the Chaos Continent!

- Description from novelbuddy