Invincible Saint Salaryman the Path I Walk to Survive in This Other World - Chapter 136: Growth

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.

Adrien’s tale is a thunderous symphony of vengeance, mystery, and ascension. Awakened with no memory but wielding a shadow-forged blade, he traverses a fractured world where gods rule through fear and silence. His forgotten blood burns with the legacy of the Godslayers—beings once feared even by the divine. As he hunts corrupted gods and unearths shards of unimaginable power, Adrien evolves from a wandering enigma to a force capable of defying fate itself. Twisting through betrayal, hidden empires, and awakening legends, his journey is not just one of survival, but of reclaiming divinity to break the sky itself.

Ethan transmigrated from earth to a post apocalyptic martial world with a system.His system has only one function: Double the attribute every day. Watch him rising in the universe with a pace faster than the speed of light.

Jiang Zhen crossed into ancient times and became the old bachelor eldest Jiang who was neglected by the whole family in the village of Jiang Xihu in Hexi Village.

He was born into a good family and Jiang Laoda is busy in the year but can’t eat a full meal. Two younger brothers can marry a wife, but he is starved to death… Jiang Zhen feels unbearable.

Don’t want to feed me? OK, I kill the chicken myself.

Don’t you give me a glimpse of food? It doesn’t matter, the door of the granary will be opened as soon as it goes down.

Want to tell me that I am not filial? Ok, I immediately took the knife into the county to slash people, and let the county grandfather grab all of us.

Jiang Zhen took the attire of the family’s best products and became a tyrant in the village. He also saw the “ugly” ger who could not get married in the village.

Future father-in-law: “Jiang Zhen is always wandering around our house. Isn’t it necessary to grab our house?”

The future mother-in-law: “What to do, Jin Geer must not beat him!”

Zhao Jinge’s face is hot… Dad, the wild rabbit that I got back today is what he gave…

- Description from Novelupdates