Floating Islands: SSS Gacha System - Chapter 108 - - Flares, Shadows, and Gale Winds

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.

After suddenly dying from work exhaustion in the modern world, a young man named Clayton wakes up in someone else’s body in a foreign world styled like medieval Europe. Without knowing how or why he ended up there, Clayton slowly realizes he now inhabits the body of a teenager who has just survived a deadly illness—and lost his beloved father.But his new awakening isn’t met with hope; instead, it brings pressure and intrigue. The people around him—from city officials to seemingly kind neighbors—all share one goal: to seize the valuable house his father left behind. One by one, their masks of kindness slip away, revealing the harsh reality of this new world.With a weak body, a nearly dead farm, and a loyal, skinny dog, Clayton must fight to survive. He not only has to delve into the memories of his body’s former owner but also navigate a world filled with manipulation, magical creatures, and social injustice.This world isn’t just an escape from work stress—it’s a battlefield for his soul and pride.

Zhang Beichen downloaded a game called “The Empress of the Warring States Period”. He needs to play the role of a famous minister to help his monarch rule the world and become emperor.

He thought it was an ordinary game. In the game, Zhang Beichen tried his best to make friends with the empress, help her unify the seven kingdoms, and achieve different endings.

Until he woke up, Zhang Beichen discovered that he had actually come to the world in the game, and the magnificent empress in the game was standing in front of him!

The empress looked at Zhang Beichen with a cold and glamorous face, and thought: “He is the servant in the Sims who has made great contributions to me, but is rebellious and wants to marry me?”

- Description from novelbuddy

Eli was transmigrated to a world of magic and became immortal.

He had endless life and could never die.

“Huh? I’m talentless? Then, I’ll just train for as long as I need, even if it takes 1000 years. That should be enough for me to become strong.”

“The skill is hard to learn? Then, I’ll take a few dozens of years to research it. There’s no way it’s that hard, right?”

“What? I can sacrifice my life force to gain spirit power? That’s a bargain!”

“The enemy is here? Hell, I’ll just hide for 10000 years. Let’s see if he can outlive me. I’ll come out once he’s dead.”

This is the story of an immortal who first struggled to live in the world of magic until he became strong enough to slaughter endless worlds.