Zombie Sister Strategy - Chapter 1368 - : Sneak Around First

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.

Unite the Clans? Create an Empire?Atrox Soryu thought he was destined for greatness… until he wasn’t.Born into the smaller Soryu Clan, Atrox was a prodigy, praised for his unparalleled swordsmanship and relentless ambition. He vowed to become Emperor of the Eternal Skies, a title that hadn't been claimed in centuries. But on the day he was to manifest his Order Mark—the source of every knight’s power—everything went wrong.Instead of the revered Holy, Elemental, or Mystic Orders, Atrox was branded with a Forbidden Order: Something twisted and wrong. A death sentence in the eyes of the world. Branded a monster and exiled by his own father, Atrox was cast into a brutal labor camp where the weak are crushed, and the strong are barely tolerated.But exile isn’t the end—it’s the beginning. In the harshest of conditions, Atrox awakens the full potential of his forbidden powers, powers that could rival even the strongest Knights. He will forge alliances with the forgotten, turn his enemies into allies, and rise from the shadows to build an empire from nothing.Betrayed, exiled, and broken? No. Atrox Soryu is building an empire—and the Eternal Skies will bow to him.

The protagonist, Punk, is a cautious, cold-blooded, and ruthless Mage.

His goal is always his top priority, over feelings or morality. When unnecessary, he doesn’t like to act like pigs to eat tigers; there are almost no life and death struggles, sometimes risky but steady progress. No strong enemy everywhere, Instead, Punk is always a strong enemy of others.

And he has a very keen interest in the secrets and teachings of the Netheril civilization.

As 21 years old Noah closes his eyes for what he thinks will be eternity, he wakes up in the body of a girl 7 years younger than him.Vasilisa, as she is known, is hated and mistreated by the people around her because of the Muddy Tongue curse which not only impedes her speech, but makes her magic unstable.This effectively makes her the harder than hard mode when it comes to reincarnation, and, of course, fate made her his “avatar” in this new world full of mechanics he only ever saw in video games.Despite this, Noah as decided…Whether as Vasilisa or himself, this time he will find a way to exist for the world.