VRMMO no Shien Shokunin ～Top Player no Shikakenin～ - Chapter 125

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.

Ni Yang, a modern businesswoman, is reborn in her seventeenth year.

The year is 1983.

In an era that favors boys over girls, Ni Yang revises her tragic fate from her previous life, skirmishes in the mall, and overcomes the most challenging obstacles, achieving success step by step – a radiant progress.

Observe how Ni Yang, with her petite but capable hands, overturns her fate from an ordinary rural girl to become the richest woman of her time.

However, in the process of building her wealth, Ni Yang inadvertently attracts the attention of a mysterious magnate.

So, the aloof and mysterious magnate in the eyes of outsiders transforms into a devoted husband, becoming an outright ‘wife slave’.

From then on, ‘wife is Heaven’, ‘serving wife is duty’.

This story is also known as “The Years When the Female Lead Conquered”.

In the distant future on Earth, there was a girl with God-like powers. That girl is the last survivor of the former human race that flourished in ancient times.

The Ancients.

And on that very same Earth, a new breed of humans with the ability to wield Magic emerged.

That girl began to observe the new human race silently.

Sometimes called a God, other times called Satan, that girl continued to observe the new human race.

This is the story of the happenings between the lonely girl and the hardworking new human race.