The Great Mage Returns After 4000 Years (Web Novel KR) - Vol 2 Chapter 339

[Mature Content] Divorced and in debt, Elena decides to become the contract wife of three rich and famous men. A fair exchange begins between a woman disillusioned about love and men with their own demands and desires. But when they demand for more than her body, she discovers many dark truths as the past slowly catches up to her.

Bought it right away.

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.

In the ancient centuries of the yonder past, the heavens and the earth was rent, and in Long Ji Continent a tribe of dragons ruled supreme. But now, the dragons are extinct, and with a mysterious catastrophe descending, the fate of the world is at stake!

A teenager named Long Chen takes on the legacy of his father, chases after the mystery behind the sudden extinction of the dragons. In a lucky coincidence, he becomes the first ancient dragon warrior in an eon, with the responsibility to uphold the dragon tribe’s honor and the command of all dragons under heaven.

With the most passionate battles, heart-moving tender scenes, brutal slaughters, and filled with the majesty of dragons. On the advent of the catastrophe, millions upon millions of dragons descend upon the world again, bringing the world to the brink of an era of war.

For he of the ancient dragon tribe, is willing to paint the sky with blood, if only for the bonds of brotherhood; with a wave of the hand to reverse the flow of the galaxy, for a goddess worthy of praise; will pull the gods down from their celestial pedestal, sunder the heavens, for the good of all living things under the sky!

- Description from Novelupdates