The World Is Ending And I Am Surrounded By Female Zombies - Chapter 365:

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.

On one spring evening when I was eight years old, I, Erica, Duke of Aurelia’s daughter, realized something.

Huh, I have reincarnated into a fantasy world, haven’t I?

Moreover, it was the romance-fantasy girl game that had the reputation of being bloody, 『Liber Monstrorum ~Phantom Beasts and the Winter Princess~』

The face reflected in the mirror was that of the villainess character of that game.

After repeatedly harassing many characters, including the heroine, she would die without exception, signaling the beginning of an event called the bizarre incident. She was a villain who deserved to get the consequences!

—I absolutely don’t want a destiny like that, though?

No, for me who has remembered the memory of my previous life, there would be no such thing.

In my previous life, I was harassed immensely by an irrationally angry yandere man who proclaimed ‘She is absolutely in love with me.’

My cause of death, too, was from being stabbed by another yandere man who I only had talked with a few times……

Now that I have become the haughty villainess Erica, I shouldn’t encounter more misunderstandings like with the previous life’s yandere men anymore, right……?

In that case, it will be fine as long as I deal with the death flags that I may have raised myself.

All right! First of all, before the bizarre incident begins at the Magic Academy, I will strike down the death flags accordingly!!

—Or so I thought, but it seems that I am about to die.

Eeh, how did this happen—!?

My disciple, whom I raised and cherished with my whole heart…That same disciple has returned and is trying to kill me.“Before you fall, before you cease to be my idol, my hero, my sun, I will kill you with my own hands. For your honor!”Just wait for a while…I’ll bring you back to your senses.

The apocalyptic girl Luo Qiao dressed as a poor little girl with supernatural powers.

I got a space by chance, which is really gratifying.

However, he found that he not only traveled through but also wore a book, and the original body in the book had a tragic fate!

Hehe, with powers and space in hand, Luo Qiao said she didn’t need anyone.

But the disabled boss in the village, who was said to be eccentric, wanted to help her everywhere.

Luo Qiao rolled her eyes, hehe, it’s not bad to hug your thighs and find a backer first.

See how a beautiful wife is raised, and see how Luo Qiao is free. …

- Description from novelbuddy