Path to Transcendence - Chapter 327 - 325: Introduce Ourselves

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.

I met the male lead in prison.

Aelock, proud of belonging to a prestigious noble family, falls in love at first sight in a chance encounter with Klopp, who belongs to a lower-ranking noble family. Aelock approaches him without paying any mind to the difference in wealth and status, even disregarding the taboo of alpha-alpha relationships. However, Klopp takes no notice of him and marries another omega.

Zero – Where the End BeginsAfter 100 lives—lived as a king, a warrior, a scholar, a knight, and even a slave—he has finally reached the last.Life number 0.No rebirth. No second chances. Only death… or glory.Thrown into the most ruthless and enigmatic world he has ever faced, he must defy its crushing grip, where power dictates fate and survival is a battle against the inevitable. His ambitions collide with the weight of his past, driving him toward a relentless pursuit of absolute control.In Zero, you either carve your destiny… or vanish into oblivion.