MTL - Alchemy Emperor of the Divine Dao - Chapter 4853 Old beast

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.

Sam Sanderson is envied by many for his job, however he himself didn't seem to like it much.

Due to his expertise in nanotechnology he was tasked with monitoring the state the Valkyries, humanity's strongest weapons who all just happen to be made into gorgeous females.

Forbidden from even touching any of them, Sam spends his days in agony watching flowers he couldn't hope to touch. However one day all of that seemed to change.

What is a genius? Capable of comprehending any battle skill regardless of the skill itself and sweeping away the bottlenecks while cultivating a new technique; this is a true genius! He Yiming was originally an ordinary youngster in the He family’s estate with not too extraordinary aptitude in learning martial arts.

Originally born from a wealthy family, she ends up leading a vagrant life for fifteen years. However, when she is eventually found by her family, she falls into another devious plot and eventually dies tragically.

Fifteen years after her rebirth, ravenously raging for revenge, she tears down the hypocritical mask of the foster daughter who had taken her place, and reduces her greedy stepmother and stepsister back to their original sorry states.

To the jerk’s profession of his deep love for her, she only has one thing to say, “Get the hell out of my life. The love you speak of humiliates love!”

Regardless of the appearances of you monsters, I’ll take in it my stride with my capability, building a business dynasty of my own, sitting in the depths of my riches, bathing in the glistening limelight of the world.

A certain rich empire’s CEO: “Don’t mind me. I’m just leaving my mark here to declaring my possession rights; I’ll wait patiently for you to grow up!” The queen’s mighty return with commercial warfare fully within her grasp, she navigates the power struggles with skill and verve. When it comes to scheming conspiracies, all she has to say is, “Who are you again? Don’t even bother!”

- Description from Novelupdates