Free Fall (Pyramid of Gold) - Chapter 19: Words of Hate

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.

The cousin that Jing Huan has been closest to since he was a child was labelled as “the other woman” in a certain popular online game: only after devoting herself did she know that the other party was a jerk with a girlfriend.

At twenty, she had a child in secret.At twenty-two, she was discreetly married into a wealthy family.Qin Mu lost her mother at the age of seven and was sent abroad by her unscrupulous father when she was only eight. Little did she expect her future to be so bright, she decided to climb up on Mu General's shoulders with great strides.Mu Yichen went from being Rongcheng's top heartthrob to its youngest tycoon—arrogant and wise, unfathomable, yet he somehow fell into the hands of a little lass.——About marriage.“Mu Yichen, we are just—friends!”“That can't be the reason you reject me!”Qin Mu was scared stiff, as Mu General rudely carried her off to the marriage registration office, to sign, to stamp, to get the certificate!——Hidden marriage for too long.“If you say our daughter is adopted from the orphanage, I won't argue with you, but when will you make me public?” In broad daylight, Mu General pinned Mrs. Mu against the corner wall, threatening her with a devilish charm.“Depends on your performance!” Mrs. Mu smirked, and the next moment, she counterattacked Mu General.“Quick, cover your eyes!” Mu Baby, who had been ignored on the side, immediately covered her eyes.

Hybern is defeated, but peace is not yet near. An ancient prophecy foretells the fusion of two souls. Nova, daughter of Feyre and Rhysand of the Night Court is to be joined with Hollis, son of Kallias and Viviane of the Winter Court. Without this union, it has been said death will claim the Fae lands, and in its destruction, all the Courts will fall.