MTL - Rebirth Space 80 Little Fierce Wife - Chapter 421 Wu Zhenyu

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.

“As long as I level up another 10 times, I will be able to activate the Gene Lock. At that time, I will be able to destroy this celestial body!” After transmigrating into the body of a trash in a future where zombies and intellectual beasts existed, Lin Xiu accidentally obtained an upgrade system to transcend human limitations and devour the heavens!

Shoved into the backseat of his father's car right after graduation, Riley Hale ended up marching toward a company building with a bagged lunch and a pen.Still in his toga, the fresh graduate never thought he’d land in the office of the continent’s top lizard, err, dragon, as his aide.And that would’ve driven any person wishing for a corporate career to tears. After all, who wouldn’t want to serve the fastest ticket up the corporate ladder: Kael Dravaryn, the infamously elegant, unhinged, and extremely overpowered Dragon Lord of the continent?Well, that would be Riley.The same Riley who didn’t expect to spend his days dodging fireballs, dressing his boss in robes more complicated than dark magic, and serving as a literal target during morning sparring.Now trapped in a job he never truly agreed to, the hardworking aide decided to hold out until it was time for his glorious resignation. But leaving a dragon’s clutches could never be easy, especially one with elemental mastery and a finger worth a private army.Yet, as Riley, who longs to quit, attempts to navigate ancient politics, wyvern threats, and other accidents (many of which are definitely not his fault), he might just hallucinate himself into seeing something beneath his boss’s arrogance and molten glares.Maybe he’d actually care if Riley got turned to ash.

Lin Ke traversed to this world and, with the help of a system, utilized modern knowledge to farm and develop, claiming kingship and dominance.This is a world of professionals, a world of swords and magic, a world of bloodline inheritance, and a world of countless racial conflicts!One day, Lin Ke rode a bicycle with training wheels past the army, facing an endless enemy ahead.[Shield Warrior], [Arsonist], [Tree Shepherdess], [Wind Whisperer], [Thunder Sword Maiden], [Eternal Freeze Knight], [Voodoo Warlock]...Looking at the diverse group of followers behind him—tall, short, plump, thin, old, weak, sick, and disabled—Lin Ke laughed and raised his arm to call out: “[Workers]! Delivery [Knights]! [Scientists]! [Doctors]... Raise the flag of Azanen and charge with me!”Thus, amidst the eerie cries and howls of his followers, the history of the boundless planes was forever changed.