The School Beauty's Super Rogue - Chapter 240 - 238 Breach of Contract

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.

In the swamp, mosquitoes danced, and a five-meter long bay crocodile was firmly bound at the snout, its vertical pupils gleaming with ferocity. At that moment, a young man cover in mud was straddling it, and he was very modest in the face of audience’s praise.“I’m Bi Fang, a professional explorer. I have trekked atop the roof of the world and traversed through the Valley of Death, and I’ve even challenged the mysterious Amazon. Even the National Geographic has named me the world’s premier survival expert, the king of the wild at the top of the food chain, but trust me, that’s all an overstatement…”Under the crimson clouds, Bi Fang silently tightened the rope in his hand and, seeing that the bay crocodile beneath him had finally stopped struggling, he pulled out the Hunting Knife and killed it with a single strike to the underside of its jaw.“Today is the second day of survival. I thought I would have to endure another hungry night, but now it seems, dinner has taken care of itself.”

Playing under the plum trees and riding on bamboo, those were the days of joyful play. It was when they first met.She was not shy but innocently charming, standing before the breeze with her hair flowing, her complexion as creamy as curds.After waking up, Xu Qingfan had returned to 20 years earlier, to the year 2002.That year, the sky was very blue, the clouds were very white, and the wind was very noisy.That year, his Childhood Sweetheart hadn't gone abroad, their parents hadn't gone grey, and he hadn't the worries of being unaccomplished.That year, he was six, she was five, and they both could fully experience the climate as snowflakes blossomed.PS: This book is also titled “Help, I'm Surrounded by Childhood Sweethearts” and “I Have a Little Too Many Childhood Sweethearts.”

[Ding........ ][System Binding.......][10%..........][20%..........][40%..........][60%..........][80%..........][100%........][ Congratulations, Host! The Strongest Family System has been bound! ]----------------------------“Huh? I’ve transmigrated…” Arthur muttered, his voice barely above a whisper as he surveyed his bewildering new surroundings. Confusion washed over him like a tidal wave.-----------------------------Arthur was just an ordinary corporate worker, an overworked cog in the relentless machine of corporate life.After seven grueling days of nonstop overtime, his body finally gave out, collapsing right before his computer screen at home.He thought that was it; he thought he was dead. But little did he know, fate had something extraordinary in store for him.Instead of fading into oblivion, Arthur found himself thrust into a vast and unfamiliar world, one ten times larger than Earth itself!To his astonishment, he had become the head of the Osborn family, a once-mighty lineage now teetering on the brink of destruction.Bound by the standard configuration for all transmigrators: The System which is the [Strongest Family System ], Arthur faced an epic challenge: to transform the faltering Osborn family into the most powerful dynasty in existence.Join Arthur on this thrilling adventure as he navigates treacherous waters filled with intrigue, power, influence and danger.Can he lead a declining family back to glory and secure their place at the top?