Kuro no Maou - Chapter 516

Qin Xi crossed the prehistoric times, just in time for the first robbery of the Dragon and Han Dynasty!

In this era when the great Luo Jinxian is everywhere, he doesn’t know his own footsteps, so he chooses to live in seclusion and enjoy a leisurely life.

[Ding, welcome the new member ‘Honghuang Boss’ to join the dimensional chat skirt! 】

Wanhua Tongling: “What is the big boss in Honghuang, can you eat it?”

The unreliable god of ninja: “The new boss enters the skirt, the status of the skirt is reduced by one, and the front row asks…”

A girl who is always seventeen years old: “In the world of Honghuang, the newcomer is a super boss, get ready to hug your thighs in advance.”

Honghuang boss: “Well, I’m really not a Honghuang boss! Wait, my Jade Rabbit just caught a wild dragon girl and went into hiding for the time being.”

- Description from novelbuddy

Yuan Ye and film emperor Fang Shaoyi were married for ten years. After a stamp from the Ministry of Civil Affairs, they got divorced and their red booklets became green booklets. Back when they had gotten married, they had proudly announced the news to the whole world. After their divorce, though, neither dared to speak up, determined to hide this development.

Liu Yan, an ordinary office worker from Earth, unexpectedly traveled to a strange world.

The heroes of the ages are on the side, embarking on a journey to conquer the heavens.

- Description from novelbuddy

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.