The Sword God of the Universe - Chapter 537: Answer Sheet No. 66

Crossing over into the 1970s to become a little girl, not enough to eat or wear, no problem.On my left, a brother spoiling his sister, on my right, a childhood sweetheart who's a warm piece of eye candy.Behind me is a group of little followers, here come the beautiful and happy days.Male lead version: Hmm, seems like my little wife has arrived.

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.

The daughter of a duke, the stuttering Maximilian, married a knight of lowly status at her father’s coercion.

In the night, cook wine with the master and discuss the way of heaven and earth!

In the snow, Yu Jian chased the tide of Guangling River!

- Description from novelbuddy