Great Demon King - Chapter 26: Entering a demonic mental state

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.

“A qualified gunner should have enough firepower coverage.”

“So my battery has a diameter of three thousand meters, which is very reasonable.”

After a grand fireworks, Chen Jiang looked at the shocked eyes of the passers-by around him and said seriously.

…

When all races were thrown into a world and started to fight, a world with the theme of survival began.

- Description from novelbuddy

“Reincarnated as an extra destined to die? Hell no! I’ll rewrite this story myself!”Charles was just a college student addicted to video games, pulling all-nighters and barely passing his exams… until he woke up as Rian Cole, the most despised member of a powerful clan. A background character. A loser. But above all…A dead man walking with an expiration date.In the original story, Rian Cole was born with uncontrollable lightning powers. He was shunned, abused, and ultimately thrown away as cannon fodder to buy time for the clan leader fighting against the hero.But Charles has no intention of playing that role.Armed with his gaming knowledge and an unbreakable stubbornness, Charles will forge his own path—even if it means defying fate, breaking this world’s rules, and shocking everyone who ever looked down on him.No system. No cheats. And Rian’s body doesn’t always do what he wants.And worst of all… the girls in this world are insane!

Liu Changgong time-traveled to a cultivation world. However, without any talent for cultivation, he was destined to be an average person. So, Liu Changgong simply cultivated for fun. When he was free, he would also do calligraphy, paint, play chess and the qin to pass time…