MTL - The End of the World - Chapter 51

With the Goddess’ blessing, he became a 『Divine Knight』 and founded an Empire.
As time passed, he grows older, and by the time the heavens called for him to come, the Goddess showed before him, asking for his last wish.

He wished to be reincarnated in the future.
He dedicated all his life for his people, he had no time to master his own arts.
This time, he wishes to live for himself, forging his body to the utmost limit.

The Goddess complied with his wish.
In the far future, the King shall reincarnate as the 『daughter』 of a renowned Knight family.
And, under some circumstances, she is labeled as a failure of a Knight, however——

「How convenient. I can stand on the foremost line without needing any rank. No better training than actual combat!」

Thus, the legend of the world’s strongest, most beautiful Knight Disciple (♀) has begun—

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.

My name is Lynn, I am fourteen years old, I am from the Rhine, I live at 75 Brilliant Avenue in Catalina, I am unmarried but have a fiancée.

Now I am studying knowledge at the Rhine Institute, and I will go home before eight o’clock every day at the latest, even if I am pestered by my fiancee. I don’t smoke, I don’t drink alcohol, I go to bed at eleven o’clock in the evening, and I guarantee eight hours of sleep. Drink a cup of warm milk before going to bed, wake up and say good morning to the mirror. When the world ushers in the comfort of the morning light of the second day, I will practice the family-inspired swordsmanship as usual. In this way, everyone said I was normal.

–until today.

【Finally you are here! Fire Tong Liu Ming! 】

[Galgame is animated, will there be many exciting parts…..]

【Where the dream begins…… Wait a minute, I’m super! Where is this? Who are you handsome? ! 】

[Let me introduce:]

【What is standing in front of you now is the owner of a special physique who can become a suffering master anywhere. The only owner of the green to shiny crown. The emperor who created the empire and the tyrant who destroyed order. Because he is too miserable, he can’t see others. Well Lived Ultimate Villain – Mr. Lynn Blazer! ! 】

Lynn: “???”

- Description from novelbuddy

In the general’s house, the eldest daughter is born again.