MTL - Your Majesty, the Empress is on the Battlefield Again! - Chapter 80 , a survivor of Huiyue Academy.

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.

He is high above, the mysterious and terrible King of the Wild. With one glance, he can see people’s romances. He hates women to the extreme, but at his first glance of her, he dotes on her and spoils her.
She is a humble transmigrator, a miracle doctor who doesn’t care for the many handsome men around her. She only wants to become strong, to be worthy of that god-like man. But when she’s finally sure of her feelings, she finds out she’s already been married for years…
……
When wronged：
She uses strength to hit the big handsome iceberg-like man in front of her eyes. “People say that I’m not good enough for you, but it is you who is an old cow eating tender grass!”
A man seizes the main point and laughs like an evildoer. “This husband has to eat the grass to confirm if it is tender or not!” He puts out the red candle……
……
The world says：
The barbarian king has no heart and has no passion.
A pregnant woman very miserably thinks,” If he has no passion, then who is responsible for this big belly?”

- Description from Novelupdates

Cheng Mingyi was a little lonely throughout his life.

He only brought trouble for the brother who he grew up with and who always had his back. Through fate, due to an accident he became a second generation rich heir, Tan Feiyang. He thought, this time he could repay his Fifth brother.

Jian Ningzhe, became a first class actor with third rated reputation. One day, the infamous Tan Feiyang gave him an olive branch…

Jian Ningzhe refused to accept the hidden meaning behind it. Tan Feiyang “…Did he just ignore my present for him?”

- Description from Novelupdates

Runes are the source of all power in the world, but for Ignotus, they were a death sentence.A mercenary, assassin, and leader of the desperate, he'd spent more than ten years running from a Fate forged by sheer, abysmal luck.But when the hunt finally ended, the unhinged Stranger did the impossible:He traded his life to maim the realm's three absolute rulers, leaving scars that even the Gods couldn't heal.Infuriated by the humiliation, Hora, the Queen of Time, cast an ancient spell to reverse the clock and erase his final strike....But her arrogance became his salvation.Ignotus regressed to the day of his Ascension, the very day he received his first Rune.This time, he wouldn't play by the rules.While others beg for Primary Elements like Fire or Water, he deliberately chooses the Element the realm deems the weakest of all, knowing its true, terrifying potential.Armed with the [Heretic Saint System], a set of Irregular Soul Glyphs, and knowledge of the realm's war-ridden future, Ignotus is done running.He will leave the family that abandoned him to forge a new Path—one that leads his own House into the Heavens, all to rewrite his Fated ending!But...Ding!That would've been too easy.—{HERETIC DETECTED!}[Nex, of House Death, has sensed the Soul that escaped his scythe.][Hora, of House Time, has seen the stain left on her clock.][???, of House Light, has witnessed the birth of a Twisted Light.][YOU ARE BEING HUNTED.]—The hunt has resumed... an unending game of cat and mouse.Would Ignotus survive this time? Or rather...Would they be able to stop him?—{Author Of Misunderstood Villain}{Alternative Title: Father Of Luck & Calamity}[Status]{Volume One, Break The World: Completed}{Volume Two, House Of Strangers: Completed}{Volume Three, Demons Are Coming: Completed}{Volume Four, Death Is Here: Ongoing}[Note]- MC's powers are very unique.- MC gains many interesting Soul Glyphs.- Fast initial progression for MC and his Cohort.Discord Link: https://discord.gg/bGGfgMfu48