Conquering OtherWorld Starts With a Game - Chapter 40.1: Brave Jean

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.

Shi Qian opened her eyes and looked at the man’s handsome face.

“You have to be responsible to me.”

The thin lips of a certain black-bellied evildoer slightly hooked, with a smile that was not a smile.

From then on, there was an extra goblin in the house of Lord Zhan, the great demon king of the imperial capital! The big devil turned into a faint king and spoiled the little goblin to the sky!

Some people: “It’s useless except for that face, it’s just a vase! I’ll be dumped by Master Zhan sooner or later!”

Not long after… the legendary god turned out to be that little goblin!

Why does the boss of the hacker army look a bit like that little goblin!

The founder of the popular game on the Internet is more like that little goblin.

The woman who defeated the number one expert in the ancient martial arts is also a bit like… a boss! Kneel down!

- Description from novelbuddy

One day, Zhang Chenfei met a car accident. Fortunately, he didn’t suffer any serious physical injuries. However, due to the impact of the car crash, his brain’s perception of the real world had turned into that of the novel that he was reading prior to the accident. The thing that horrified his wife, Jiao Qi, was… the Smart Brain, Louis XIII downloaded a series of books which meant that his husband would turn into a different character each time!

How will our adorable little wife deal with this kind of husband who seemed to suddenly suffer from multiple personalities?

This novel’s plot focuses on Zhang Chenfei’s changing personality based from the characters in the books, and how his wife, Jiao Qi, deal with every character as he will have to act in sync with whoever his husband’s character is. This is per the advise of the private doctor since treatment of this special condition was still under research.

As they act out their roles, they will gradually discover and learn more about the other, which they’ve never known in their seven years of living together.

- Description from Novelupdates

Zong Shou is a player of the historical VRMMORPG “God Emperor,” and him being one of the “Seven Emperors” within the game.

For unknown reasons, Zong Shou finds himself transmigrated into the past, a period just before the “God Emperor” game history started! Possessing the weak body of a monster princeling in the process.

Zong Shou adventure describes his struggles to stay afloat in a merciless environment, and rising up despite all adversities, of course, surrounded by beauties along the way.

- Description from Novelupdates