I Became a Genius Commander at the Academy - Chapter 200: Peter Yaeger’s Women (1)

The happiest thing in the world is to be able to amend what you have done wrong. She who acted willfully because of a game, was reincarnated into a time when she still had her parents’ love.

For the sake of her family, she began her life as a pro gamer.

But this time, she was no longer the Human Sorceress that she was familiar with. She was an Elven Huntress. Could she still acquire the power to be the Right Hand of God?

- Description from Novelupdates

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.

Transcendent awakening, Eternal Night is coming.Pei Jinye transmigrated into a Federation-controlled world as an ordinary high school student, starting off destitute and with a gloomy future.Luckily, he could pick up Attribute Light Groups and synthesize Transcendents.【Spirit·Blood Spear】: Transform spiritual power into a spear, capable of Devouring the opponent’s memories and stripping away their Transcendent!【Body·King Kong】: Blood energy flourishing, King Kong with Furious Eyes, an invincible Physical Body!【Power·Savage Mountain】: Unmatched stamina, a force that could swallow ten thousand miles!……In the Year 404 of the Star Calendar, the divinations were extremely ominous.That year in the Eastern Continent, divine prophecies descended, and disciples of the old gods walked the earth.In the Western Continent, a vile flame shot into the sky, and a Taoist set off with his Golden Lotus.Swordsmen from the North Continent threw down the gauntlet, aiming to be the best in the world.Priests from the Southern Continent, in the name of the new gods, hunted the disciples of the old gods.And Central State became the central battlefield, embroiled in chaos, too preoccupied with internal strife to care for anything else.It was also this year that Pei Jinye agonized over whether he should infiltrate the Federation as a disciple of the old gods or hunt down the disciples of the old gods as a Federation enforcer…“How did everyone end up being my people in the end?”

Ethen Cole travels to an era where everyone battles with pets. In a world revived by spiritual energy, danger and madness run rampant. Humanity relies on battle pet masters to establish bases and unite for survival.Before the college entrance examination, Ethen Cole is framed and expelled from school, losing his chance to study at the Battle Pet Academy. Just as he feels despair, the Battle Pet System for battle pets activates.“Ding! The Blue Riolux has evolved into a Emerald eyed Riolux!”From then on, Ethen Cole begins his legendary career as a battle pet master.