MTL - God Level Cultivation System - Chapter 3289 Sword world

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.

Frank, a mercenary known for his cold ruthlessness, decides it’s time to leave the bloody world of the underworld behind. But the underworld has no plans of letting him go. Relentless enemies from his violent past keep hunting him, and eventually, they succeed—Frank is killed.But fate has other plans. Instead of staying dead, he is mysteriously reincarnated into the body of a cop in a world filled with crime, corruption, and dark secrets. With the help of a strange, all-knowing system, Frank is given the chance to live again—this time, to prevent crime before it happens.

Born of a great family, world shaking genius.

The man who had shaken the world.

The story of the Swordmeister.

On the wedding night, when the bride hung herself, the handsome husband was sickly, the concubine was glaring like a tiger to see what her best next move would be. Shu Huan who time-travelled to the ancient times encountered such a mess.

“Men and women can’t touch each other. You doing this is not right, right?”

“Humph, you are already married to me. You still care about that?”

“Eh eh, second young master, you haven’t healed yet. I’m thinking for your own good.”

“Doesn’t matter, this young master isn’t interested in your bean sprouts like body.”

While sleeping, they put a barrier of pillows between them

Woman: “Eh…Eh….”

Man: “Eh…what are you doing?

Woman: “Don’t cross the line.”

Man: “Ah……?”

Woman: “If you cross the line, I’ll hit you with the incense burner.”

Man “Uh……”

Woman: If……if I accidentally cross the line……you don’t…”

“Humph……if you continue to talk, I’ll tear your clothes and seal your mouth.”

“You check so carefully because you are afraid that I’ll harm you?”

“That isn’t it. Humph, I only want to know why someone will commit suicide by hanging on the wedding night.”

“……”

“You hate me so much? You prefer to die instead of spending the wedding night with me?

- Description from Novelupdates