Invincible Immortal Cultivator in the City - Chapter 55 - 56 Three Thousand Beauties

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.

Klein’s greatest wish is to transmigrate to another world and live life in an isekai, just like in anime, manga and novels. However, fate is on his side and the typical truck that the main characters always carry in isekai runs over Klein. But, to his bad luck, he lived a few more days in the hospital and, just on the day he died, Klein heard a ⟨⟨-DING-⟩⟩ that he knew it meant. That was the day of his death, but also the beginning of his adventure into another world.

Jian Heng, who lives in the United States, only wants to make enough money and return to China to retire happily. Unfortunately, by accident, he becomes a poor rancher!

Fortunately, he has an unknown cheat. From then on, Jian Heng started to run his own small ranch, and at the same time added some private goods, so that the group of American guests who came to the ranch adapted to the self-created Chinese style’ There are forceful living habits.

The new book “Small Peasants in the Great Era” is released, welcome everyone!

- Description from novelbuddy

What did death feel like?Ezekiel didn't want to remember. He wished to never experience that void expanse of nothingness ever again.Luckily he had been reincarnated into a world with magic and the sorts. But as a Mechanic!Watch as Ezekiel defies his manaless destiny by walking the path given to him by that Being as a Mechanic born to rule over all.He had been an ordinary person in his last life but he refused to allow that term follow him into the next.“I can still become someone important. Not as an Awakened from Taia, but as a Battle Mechanic from Earth!”