After Marrying the Officer - Chapter 458, brother and sister-in-law, you two are too cunning.

The king of assassins was reborn, mastering both alchemy and poison. Sitting inside the space, there was a ghost that loved crying.

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.

This is a story of the flesh pushing everything.

In the Great Ye Dynasty, darkness descends, full of evil spirits and ghosts, killing invisible.

In the face of demons and evils, ordinary people can only shiver, curl up in the corner, and wait for their lives to come to an end.

Jiang Dao came through, carrying a martial arts modification system, and any martial arts can be modified infinitely as long as he glances at it.

The mad magic stick method, the eagle claw iron cloth shirt, the poisonous sand palm, the violent ape magic… are all revised to the realm of a thousand years later.

Facing the evil spirits, Jiang Dao had a burly body, muscles all over his body, and his eyes were like electricity.

“Evil spirits? Who said martial arts can’t kill evil spirits?”

- Description from novelbuddy

I wrote a book once.It was an unhinged fantasy born from my high-school brain, driven by loneliness and too many hormones.It was a world of beastmen, wild freedom, and the kind of romantic attention I could never get in real life. I poured every impossible desire into it: adventure, danger, and yes… a 'lot' of handsome partners.Before I knew it, I had a thousand chapters of pure escapism and pure thrill.Then on a college camping trip, I fell off a cliff.I expected to wake up in a hospital room but nope. I woke up on a soft field of grass, with air too fresh to belong anywhere on Earth.And then something moved behind me.Sticking out of my tailbone was... A tail.My tail?Yellow and black stripes and very, very real.I touched it. Completely real.My ears? Also gone—well, moved. They were now perched on top of my head like a confused jungle cat. And the outfit? Quite revealing, made of animal hide which matched my tail.What was going on?At first, I thought it was a prank. Or a dream. Or maybe karma is finally cashing in. But the more foreign memories evaded my mind, the clearer my situation became.This wasn't cosplay and it wasn't Earth, either.And—surprise—it wasn't even the world from my own book. Welp.I had been transported into a completely different Beastman world as a beast girl called Arinya.Sounds fun, right?Well… it would be, if I weren't apparently the ugliest duckling in the entire freaking savannah! Rejected by every potential mate I stumbled across and sneered at like a freaking eyesore.This was not how I planned my fantasy to come to reality.Trust me—if this is my fantasy come true, then someone needs to fire the author.But then again, after entering this world, I'm suddenly... Attractive.I mean, there's no change to my face and the freckles are still there, but for some reason, handsome beastmen begin to flock around me, because I smell... Pleasant.What's that all about?