The Strongest Onmyoji and the Shikigami With AI are Unparalleled in Another World ~ A Second Life Properly Enjoyed Using Artificial Intelligence ~ - Chapter 193 - Late…

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.

He rose from abjection and achieved eternity in glory.
He embraced the prettiest beauties and killed the strongest opponents.
He was able to shift the clouds into rain and cover the sky with one hand.
He could overrun the entire world and go anywhere as he pleased.
He pacified wars and held the world in awe.
He was matchless in the world.
However, his hair turned white overnight for his beloved woman and he was on the verge of death.
He was surrounded by enemies who were trying to take his life.
He struggled his way to become mighty and fought for everything he cherished.
For this age, he was the only king of the Dark World.
His name was a byword for might.
As a man living in the world, his only ideal was to pursue brilliance.

Lin Lan transmigrated into a book set in the 80s and became a young widow with a child.As soon as she opened her eyes, someone was at her door demanding payment of debts, and when she went out, she was met with the disdainful and contemptuous gazes of her neighbors!She, a person who had owned a house and a shop through her own efforts, would she fail in the 80s?Facing external threats and internal difficulties, she picked up the skills from her past life, selling spiced broad beans and pea cakes outside, opening a shop...Her sister-in-law said, “Lin Lan, that man is not bad. He's strong and very family-oriented.”“No time, I'm busy with my business.”Her maternal aunt said, “You're just a widow, what are you being picky for? He's a 'ten-thousand-yuan household,' he doesn't mind that you have a child, you should be content!”A ten-thousand-yuan household! Heh heh!A certain man watched the busybody matchmakers who came to introduce partners to Lin Lan, his eyes gleaming with a cold light, as he strove to pursue his wife!

Rogel downloaded a magical pixel game—“Mysterious Sea”.After manifesting the kitten from the game, he fell into contemplation...