Re-Overlord: I Can Acquire Anything! - Chapter 100: Opening Up A New -

Cal was the pride of his guild, the one that other Initiates looked up to. Then he died. So did his guild.His understanding of the world shattered before his death. His guild was nothing compared to others, which meant he was the best of the worst.When Cal was given a second chance, he wouldn’t repeat his mistakes. Who cared about being a [Mage] when it would just mean death? He would survive, even if it meant being something he sneered at in his previous life.A [Farmer].Of course, when did anything go according to plan? Never.

In the early world of immortal cultivation, there was no physical cultivation among immortal cultivators. And a top bodybuilder who came from the earth has opened up a new path here and became the ancestor of physical training.

- Description from novelbuddy

9-Star Talent Awakened—Primordial Justice.Lex, a 'D' rank hero, struggled while trying to find a job after the sudden disappearance of the gates, dungeons, and towers where monsters used to come out.Dying by his lovely wife's sandal, who turned out to be the protagonist, Lex got reincarnated in a game-like world ruled by the Various Court's, which govern the Monarch's and make rules. In such troubling times, can he become the one who makes the rules, or does he have to bend them?A/N: The main character is mainly a selfish villain, so if you're here for burning town's and pillaging villages, you're in a perfect place. It will take time to develop his character, but he'll get there.

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.