Taking advantage of the beauty being poor, fooling her into being my girlfriend - Chapter 37 - : So This is What it Feels Like to Receive a Gift from a Girl

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.

As a boss with space plant abilities in the apocalypse, Lu Yao once traveled to the future, became the director of a nursery school that was about to close down, and became a rare animal human on the verge of extinction.
The food she made at random can cure the genetic disease of the cubs in the welfare home. She punched the cubs’ scum fathers and scum mothers, and kicked the remarried families who abandoned the cubs.
It is such a good kindergarten successor dean, who is attracted by that single cool imperial marshal!
Since then, the barrage in the live broadcast room has become:
Imperial Citizen A: Dean A, I really want to marry.
A certain big black dragon: Shut up! This is your marshal’s wife!
CP: Dean Lu Yao, who is extremely protective of short-sightedness and loves cubs, X the imperial marshal Helanjia who loves Shang Yunxi more than cubs
Brief: There are no bad cubs, only bad big ones.

- Description from novelbuddy

When Li Shen’s second personality acts out, her consciousness is sent to a strange place called Split Zone No.13. She is then informed that she can only return home after unraveling the truth.

The Empire stands triumphant.

For twenty years the Dread Empress has ruled over the lands that were once the Kingdom of Callow, but behind the scenes of this dawning golden age threats to the crown are rising. The nobles of the Wasteland, denied the power they crave, weave their plots behind pleasant smiles. In the north the Forever King eyes the ever-expanding borders of the Empire and ponders war. The greatest danger lies to the west, where the First Prince of Procer has finally claimed her throne: her people sundered, she wonders if a crusade might not be the way to secure her reign. Yet none of this matters, for in the heart of the conquered lands the most dangerous man alive sat across an orphan girl and offered her a knife.

Her name is Catherine Foundling, and she has a plan.

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A Practical Guide to Evil is a fantasy series about a young girl named Catherine Foundling making her way through the world – though, in a departure from the norm, not on the side of the heroes. Is there such a thing as doing bad things for good reasons, or is she just rationalizing her desire for control? Good and Evil are tricky concepts, and the more power you get the blurrier the lines between them become.