Princess is Glamorous in Modern Day - Chapter 936 - The Peak of Power

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.

Countless dimensional worlds appeared, and human beings began to practice.

Open the gene lock, break the shackles of the human body, absorb the gene core of the alien animal, and extract the skills or talents in it.

Warrior, Mage, Archer, Assassin, Support.

“What is your job?”

Yuan Bei shivered while holding the self-made cheating system.

“I’m assisting, with hard control…”

This is the story of a hard-charging assistant spreading positive energy in the world.

- Description from novelbuddy

“How long has it been?”10,000,000 Years, a period of time which he dwelled in the endless abyss as a captive of war.After his fall, he lost everything to the hands of those who stand above the heavens.The twelve gods of the constellations, the Primal Zodiacs!Creatures who descended down from the absolute light to consume all.He fought against them only to fall prey to their destruction, locked away in the endless Abyss.Astroth Vermont lost it all, his will, his empire, his powers and his mind, all he knew was despair.But that’s until he woke up, Returning back to the world as someone else.The Blackest Evil was reincarnated as the Tenth Young Master of the Reinhart Family.His return is going to shape the world, returning all into chaos!Will he exact his revenge?Who knows, welcome to the land of carnage

When Xiao Fei was three years old, he was caught by a man with a sharp-nosed monkey and taught him to cultivate. The old man is Sun Wukong. In the past ten years, he has taught him the eyes of the fire, the copper and the iron bones, and the great product of the immortality… After the learning, Xiao Fei went down the mountain and accidentally entered a noble school. Pure school flowers, the best Lori, Miss Qianjin, beautiful maid… I like to sleep with him. Oh no, it’s a friend.

- Description from Biquge.com.cn (translated)