Level Eater - Chapter 10: Practice and Meditation

The messengers of destruction have once again been sent by their god, bearing the promise of apocalypse.Fire consumes everything, heralding the end of worlds— from Asgard to Atlantis, from heaven to hell. Once again, the fist of the god of destruction is poised to crush the very dimensions of existence, drawing ever closer to its goal. Amidst the chaos, a humble foot soldier—an insignificant speck on the grand stage—struggles to survive, fighting to climb towards the top.This is the combined story of Global Demon King: Starting as the Abyssal Dragon—Stronghold Legends and writer creativity

A high-ranking officer in the Marines and a master of both Western and Chinese medicine, Feng Yu Heng is transmigrated with a duang sound to the Da Shun Dynasty.

Right after getting the first-class chef’s certificate and before that certificate had been in her hands long enough to warm up, she woke up. Not only did she age ten years, she also gained two children…

—

At this time, her new daughter, who had lost two of her front baby teeth and spoke with a lisp, pointed at the TV screen and called out, “Dad!”

On the screen, the Film Emperor Meng Yan was extremely handsome and charming. Towards the camera, his gaze was overflowing with gentle and tender feelings. He raised up the hand that was holding hands with captivatingly beautiful bride. She was wearing a diamond-beaded wedding dress. At the bottom of the TV screen, the headline news was displayed in large font – Meng Yan and the rising starlet’s wedding of the century.

T/N: The second part of the summary is misleading. This isn’t a novel where the transmigrated main character clings onto the film emperor’s thigh.

- Description from Novelupdates

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.