They Said I’m Mr. Gu’s Scandalous Affair - Chapter 142 - : You’re Very Beautiful

She was a medical expert, talented and beautiful. She was reborn as his little wife. Her in-laws did not like her, her husband did not love her, and she was as timid as a mouse. She was weak and easy to bully.

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.

Video games are one of the important ways to entertain people in the new era.

However, Take Yuxing from Japan, who traveled to a parallel world, found that the game industry in this world was extremely sluggish, and it seemed that it had never arisen.

So Zhu Yuxing decided to bring the ninth art to the world.

“Mom, Super Mario 3 is out! This is my most wanted Christmas present!”

…

“My Zelda is addicted to picking branches and has no intention to save the princess”

“It was Link who saved the princess!”

“Huh? Is it? Well Zelda”

…

“I am willing to sacrifice my soul just to protect the fire girl!”

…

“More than racing, Forza is YYDS!”

…

“Tifa is my eternal goddess!”

Games never sleep, this is a story that will only focus on developing the game entertainment industry.

(This story is a parallel universe and does not insinuate any related characters. Any similarity is purely coincidental)

- Description from novelbuddy

In this school fantasy story set in the distant future, creatures contaminated by pollution have overtaken the land, forcing humanity to live in isolated mobile cities called Regios. One such city named Zuellni is a self-contained school in which freshman Layfon Alseif has just enrolled. Layfon reluctantly joins the 17th Military Arts Platoon led by the third-year student Nina Antalk and embarks on a series of adventures.