Eclipse Online: The Final Descent - Chapter 10: THE SHATTERED SOUL

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.

Her boyfriend and her sister tangled together in the sheets, so she turned around and married the fearsome business tycoon, Gideon Leith.

Not only is she a star in her own right, but she's also a publicist and an entrepreneur?

A super racecar driver? A worldrenown gold medalist designer too?!

Just who is this precious hidden treasure of a girl!!!

She went from being pitifully spurned to a goddess looked up to by tens of thousands of people, and her admirers queued from Jincheng all the way to Kyoto.

Mr. Leith, who saw a certain someone's feminine charm, quickly tucked her into his arms.

“Wife, I need to hide you well. You can only belong to me!”

The Final Haven Kingdom.

The last known habitable place for humans. Protected by it's faithful Knights, it's walls were destroyed and rebuilt over and over again, signifying it's strength and unwillingness to bow down before the forces of evil.

Raven, a young man who's soul returned back in time with his memories intact, what are the changes that he will bring to prevent the kingdom's destruction?

Join his adventures along with his family, friends and his lover to find out what is his own Way of being a Knight.

He Xie, a private detective, specializes in investigating extramarital affairs, and once made mistresses and scumbags fearful, he is a good young man with lofty ideals. In the event of an accidental death, you have to start a new life system and complete tasks in exchange for the chance to be reborn.

In “Infernal Affairs”, he worked hard to be a “good person” instead of XXX; in “Youth Bao Qingtian”, he tattooed a sun on his forehead; in “Charlotte Trouble”, Yuan Hua and Qiu Ya sang a plum blossom together, “Lu Xiaofeng” “, “Dragon Babu”, “Kung Fu”, “Bourne Bourne”, “Lord of the Rings”, “Pirates of the Caribbean”…

- Description from novelbuddy