MTL - Ascending, Do Not Disturb - ~ 10. Ventilation into the body

The two faced number one female spy transmigrates to a different world and becomes an outrageous idiot girl. When she woke up, what she had to face was consecutive blows of the decline of her family clan, her crippled martial skills, and her disfiguration. To protect her family, she must obtain the treasured book, obtain outstanding achievements, summon a dark beast army. Wait and see how in this unfamiliar, dark magical continent, she dies and becomes a demon then steps up to the top, making all of the formidable people in the world bow down to her in respect.

- 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.

Host: What is your dream?Lv Xiaobu: To eat and do nothing, to do as I please.Host: Then how did you become the world's richest man?Lv Xiaobu: How would I know? You ask a spendthrift how to make money? Really! I want to go back to sleep.Host: Please don't...Lv Xiaobu: Tip, five thousand.Host: Kneeling and sending off Young Master Xiaobu, may Young Master Xiaobu rule the world forever!Lv Xiaobu: Wahahaha!

Damon’s lips twisted into something between a smirk and a sneer. “Sisters or not, I kept them alive so you could watch me rip off their heads one by one. That’s the only reason they’re still breathing.”My jaw tightened. “You wouldn’t.”He leaned closer, his voice lower. “Wouldn’t I?”“You kept them alive?” I repeated his words slowly, my voice cracking with disbelief. “Just so I can watch you kill them?”Damon stood tall, his eyes twirled with something sinister, his expression was like a carved stone. “Yes,” he said flatly. “You cared enough to protect them. Now you’ll watch as I end them.”My chest tightened. The air grew too thick to breathe. “You’re cruel.”“I’m Alpha,” he replied, his tone cold, without a shred of mercy. “Mercy gets people killed.”‘Psychotic bastard. I wish I could drive a knife into your chest right now!’~~~~~~~~~~~~~~~~~~~~~~~~~~When Ember opened her eyes, she was no longer the powerful, independent woman she once was.Instead, she woke up in the fragile, abused body of a lowly Omega—destined to be nothing but a breeder for the Alphas.Her escape attempt didn’t get her far. Instead, it led her straight into the path of Damon Blackthorn—the ruthless Lycan King feared by all.Sold like a slave by her own father, Ember becomes the property of a man with a frozen heart and a violent temper. But beneath her submissive mask lies something more: a cunning mind and a will that refuses to break.Now, in a world ruled by dominance, power, and ancient bloodlines, Ember must do more than just survive.She must outsmart a king.She must earn the loyalty of the very people who scorn her.And maybe—just maybe—she’ll bring the Alpha to his knees.