Master Smith Under Ministry of National Defense - Chapter 180: Mechanics Beat Bionics

After a mortal accident left him dead, the soul of Wang Wei was sent into the sacred body of an unborn child in an ancient world of cultivation where only the strongest survives.

Along with the ancient soul of an immortal taoist, follow Wang Wei from a small clan as he strives to carve a name for his clan and himself.

Three years ago, when Sovereign Union disbanded, gaming genius Mo Bei laid low and went into seclusion.

Three years later, she returns with a concealed name, disguised as a man.

Despite being scorned and loathed, she ultimately reascends to the thone, causing a sensation in the entire nation!

Handsome but aloof, pursued by countless fans, he was the famous King of the eSports scene.

Dark Flares’ Captain, who was known for his looks, was even more famous for his ambiguous playing style.

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When she first joined the team, he told her, “Know your place. Do not try to have inordinate ambitions.”

Subsequently, when her identity was exposed, he looked up from his seat at the table and stood up gradually. “Are you thinking of deserting me after marrying me in the game? Hmm?”

Sequel to National School Prince Is A Girl! Mo Bei is the disciple of NSPG’s Almighty Qin. Join him as he too becomes one!

He has won the most flamboyant compliments and the most vicious swear words.

He is a guy with rebellion flowing in every vein in his body.

He’s a white kid who’ll never be a celebrity.

He is a young man from the countryside in the eyes of the public.

He’s Tommy Hawk.

He was born again.

Welcome to the first half of the American Dream and the second half of the American Nightmare.

Let us please, come Tommy Hawke, in the winter of 2022.

- 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.