MTL - Return of the Divine Emperor - Chapter 1 Return of the Fairyland

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.

Reina Suzuki was an overworked office worker—until she died and woke up as Lavinia Devereux, the infamous villainess princess of the Elarion Empire.She knows how this story ends: she’ll drink poison and die. A painless, easy death. So why bother changing fate? Villainy, revenge, redemption—sounds like way too much work. She decides to do absolutely nothing and let the story play out.But her terrifying father, Emperor Cassius Devereux, won’t ignore her like he’s supposed to. He watches her, questions her, and—worst of all—starts acting like he actually cares.Lavinia just wanted a quiet villainess retirement… so why does everything keep changing?

In the Province of the Nine Skies, far above the heavens, there exists Nine Galaxies of Astral Rivers made up of countless constellations interwoven together.

For Martial Cultivators, they could form an innate link with one of the constellations, awaken their Astral Soul, and transform into a Stellar Martial Cultivator.

Legend has it that, the strongest cultivators in the Province of the Nine Skies, were beings that could open an astral gate every time they advanced into a new realm. Their talent in cultivation was such that they could even establish innate links with constellations that existed in a layer higher than the Nine Layers of Heavens, eventually transforming into the heaven-defying and earth-shattering power known as the War God of the Nine Heavens.

Qin Wentian is the MC of this story. How could a guy, with a broken set of meridians, successfully cultivate? There were countless Stellar Martial Cultivators, as there were countless constellations in the vast starry skies. What he wanted to be, was the brightest constellation of all, shining dazzlingly in the vast starry skies.

- Description from novelupdates

Chu He transmigrated into a barren world as a lowly odd-jobber in the Xia clan. He had initially accepted his fate and was ready to spend his life ordinarily and peacefully. Little did he expect himself to suddenly awaken the Checkpoint System which rewarded him for checking into places!

Ding, congratulations to the Host for successful checking-in. For your first check-in, your reward is the Golden Nine Turns. Ding, congratulations to the Host for successful checking-in. For your twenty-one-thousandth check-in, your reward is the Golden Manifestation of Buddha’s Form.

Chu He was certain that the world outside was too dangerous, so he resolved to not leave the book depository until he became truly invincible and peerless, and thus he stayed for a hundred years. A hundred years later, the Tiger clan attacked the Xia clan and planned to massacre countless humans, it was at that moment that Chu He finally showed his hand!