Extracting Billions Of Toxins And Tempering An Unsullied Body - Chapter 18 - A Pile of Junk. They Didn’t Understand the World of Geniuses

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.

Lacking a pocket dimension, lacking a power, lacking a thigh to hug onto and the three life advantages (money, power, and looks), he had been cautiously living in the apocalypse for ten years, getting closer to falling inside the zombie’s mouths. But unexpectedly, he had the terrible luck, to be caught in a fight between two gangs and die, it really left people feeling disappointed.

But when he opened his eyes, he had returned to a decade ago, three months before the apocalypse!

Like before he still lacked an ability, an ordinary person without a pocket dimension, but he did have ten full years of experience living in the apocalypse! Even if he didn’t fight zombies, didn’t hunt monsters, he could still live a carefree farming life in the safe zone.

Find a safe house, utilise all kinds of skills from his previous life to farm in exchange for meat, and if possible, find a person to peacefully spend the rest of his life with; ordinary people had their own ordinary little pieces of happiness.

Originally believing he had picked up a beauty he returned home to prepare a golden house, but on the contrary he was the one being pushed down……someone once said, whether it is people or matters, by no means can you only look at the surface!

- Description from novelupdates

Ethan Walker a normal boy was just playing his game favorite game [Legacy Of Heroes]. But who would've thought fate had a different plan for him.“Why him of all people!?”Transmigrated into the world of the game he takes on the role of Noah Von Blitzfeld, the younger son of the Blitzfeld Duchy, who was fated to die while saving his fiancee in a disaster unfolding in the academy.

Derek Carter never asked for a System, an apocalypse, or the pressure of being humanity’s so-called “last hope.”He was just trying to survive the daily struggles of being an orphan in Paleview City—dodging bullies, scraping together meals, and lying his way into school. Life was already hard enough.Then, one day, a blue screen pops into his vision:[Warning: The world is doomed. Try not to die.]Yeah, great. Just what he needed—cryptic doomsday messages and no instruction manual.Now, monsters are creeping into the city, reality is unraveling, and Damien’s “legendary” starting stats are barely above zero. The System promises him power, but there's just one tiny problem—he’s never won a fight in his life.Armed with sarcasm, questionable decision-making skills, and the sheer refusal to die, Damien is about to embark on the worst (and possibly last) adventure of his life. Because if the world really is ending… he’s at least going to make it someone else’s problem first.After all, heroes are overrated—survivors get to tell the story.