MTL - The Mightiest Leveling System - Chapter 5700

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.

“One Generation Immortal Venerable” Luo Chen was attacked and reborn and returned to Earth.

He is an ordinary person, facing the contempt of his girlfriend, the ridicule of his rivals, the miserable life of his parents, and the threats and provocations of the rich and young.

He vowed to change the injustice of fate, stand on the pinnacle of this world, and tell everyone that Luo Chen had been here.

- Description from MTL

I returned to Earth as the invincible Knight King. But the Gods came with me.

It all started with losing her mother, getting thrown into a boarding school, and then having the rumored witch-like princess of the kingdom desire her and want her by all means necessary. But it isn't the innocent type of desire she had expected. It's something much darker than she could ever handle. **** Sera didn't think her life would ever take a turn for the worst until her worthless father remarried her mother's half sister and, on her orders, sent Sera to a boarding school that was far off in a different kingdom—Elysium High, an all-girls academy for the most prestigious daughters in all of the seven kingdoms. In Elysium, only the most powerful could survive, as even the prettiest and most innocent-looking faces had skeletons in their closests and would ruin anyone or anything that got in their way. Unfortunately for innocent and naive Sera, she would become the newest prey of Elysium, and everyone wants a piece of the beautiful redhead. But what happens when the most unexpected person also takes an interest in her?Electra's name alone was enough to get the entire school shaking in fear. Not only was she the only heir to the most powerful kingdom in the realm, she was also known as the cold-hearted queen of Elysium High. Nothing and no one ever caught Electra's attention, until the arrival of Sera, where everything changed. And all it took was for clumsy Sera to bump into the most powerful one of them all. THIS BOOK IS RATED 18+! It contains matured content such as:⁃ Bullying⁃ Smut (BDSM included)⁃ Violence.⁃ HaremSo read with caution, and don't say you weren't warned!