MTL - The Wife is First - Chapter 39 Forgot to say

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.

Instead of causing chaos with my knowledge of the original work, I assisted the protagonist.

I successfully completed the story and now planned to retire and live peacefully.

However, it seems the protagonist still needs my help.

An academy professor? That’s nothing much.

But why is the state of the academy so strange?”

In the waves of steam and machinery, who could achieve extraordinary? In the fogs of history and darkness, who was whispering? I woke up from the realm of mysteries and opened my eyes to the world.

Ruan Yingyin is a silver hamster who inexplicably transmigrated into the novel 《After the rebirth of the villain》she had read.

The villain Jiang Xingyuan had a girlfriend named Ruan Yingyin in his previous life, but Ruan Yingyin later betrayed him, causing Jiang Xingyuan to go bankrupt, and finally ran away with money.

Jiang Xingyuan’s ending in the novel was miserable. He regressed back to high school and retaliated against Ruan Yingyin. Ruan Yingyin’s ending was much more miserable than Jiang Xing Yuan.

After remembering everything, Ruan Yingyin: As a silver hamster essence who transmigrated into the book, I just want to concentrate on studies. QAQ

Ruan Yingyin felt that she had to study hard to catch up with her classmates. But when the results came out, she was the first.

Ruan Yingyin felt that she could not sprint, but when she ran, she crossed the finish line first.

Ruan Yingyin felt that she wasn’t good at singing. As a result, at the school party, a small video of her singing was posted on the Internet, instantly gaining countless fans. Even people from the recording company came to invite her to debut as an idol…

The villain who bullied her at first, he stepped on her chocolate, kicked her stool, and forced her to eat mustard, finally, hugged her tightly in his arms and whispered to her, “baby, help me…”

- Description from Novelupdates