MMORPG: Divine Monster Transmuter - Chapter 1009: Creation Village

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.

A face is a face, a song is a song, a composition is a composition.

Beautiful, talented and hardworking upcoming idol Sun Woojoo.

One day, a miracle came to him!

“I’ll become a star who shines more than anyone else.”

His dreadful dancing wasn’t an issue anymore.

At last, an idol with everything prepared.

Now, a monster rookie has appeared in the entertainment world!

In this life, the greatest star in the universe!

Li Wei accidentally obtained a simulator that allowed him to manage a family of cultivators. He discovered that the descendants in the game would offer him strange and unique sacrifices.“Thanks to the ancestor for the gift, our family has become the most powerful family!”“Hurry up and offer a sacrifice to the ancestor. Please accept this spiritual weapon!”“Ancestor, we have already conquered the immortal world!”Then, one day, the descendants of the Li family, who had been in the game, appeared on Earth in grand flying boats. Under the astonished eyes of the entire world, these descendants paid homage to Li Wei in great numbers.“Welcome our ancestor home!”

The countries of Mephius and Garbera have been waging a war for ten years and are trying to put an end to this long fight through a political marriage between the two royal families. Orba, who was driven from his home because of the war and was forced to become a gladiator, looks exactly like the crown prince of Mephius, and it has been decided he will be substituting him during the wedding ceremony. On the other hand, Vileena, the princess of Garbera, has secretly decided to ensnare the crown prince for her own country’s interests.