Demon King & Hero - Chapter 3-2

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.

“Aria,” he said softly. “Today is your birthday.”It wasn't a question, but I nodded nevertheless.“The moon is full tonight,” he added, his voice quiet. “You will attend the ceremony.”“Of course, Elder,” I replied, puzzled. All eighteen-year-olds attended the ceremony. It was essential.He leaned in, smelling gently. “You already feel it, don't you? ”The change.My heartbeat skipped. “What change?”Elder Malin's eyes narrowed. Interesting. “Very interesting.” He reached inside his pocket and retrieved a little pouch. “Wear this tonight.”I accepted it hesitantly. Inside was a simple moonstone pendant with a leather cord.“But this is for—”“Wear it,” he interjected. “Hide it under your clothes if you must, but wear it.”Moonstones were precious. They aided our connection to the Moon Goddess during ceremonies. However, they were only given to wolves from influential families (Alphas and Betas). Not Omegas like me.“Why?” I questioned.Elder Malin glanced at Mira before returning his attention to me. “Because someone is harboring secrets about you, child. And tonight, those secrets may be revealed.”I never mattered in our pack. Omegas like me serve, submit, and survive. We don't dream of love. We don't dream of power.She was the future Luna. I was just the girl who watched from the shadows.But everything changed on my 18th birthday.I felt the bond. I met my mate.One of the Alpha's sons.But the Alpha has triplets, and I felt the mate bond with all three and it seems the three of them felt it too — three perfect warriors, three powerful Alphas, three secrets buried beneath the surface.One of them is my destiny.One of them is lying.And one of them might be the death of me.The Moon Goddess doesn't make mistakes... but this time, I think she might've given me too much to handle.

In her past life, Meng Yu couldn't understand why her mother would give the university admission she worked so hard to earn to her younger sister and even sell her off to a remote village as a common wife, just to raise travel funds for her sister.Reborn, Jiang Meng Yu has just escaped from human traffickers, only to be caught by a 'buyer husband'. The fiancé her mother had originally set up for her, whose identity was usurped by her sister, comes to her rescue. She says, 'You saved me, I have nothing to give you as repayment but myself.' Yet when her mother comes, she coolly claps her hands and walks away with her.Captain Gu traps Meng Yu against the wall: 'Flirt with me and then want to run? No way!'Meng Yu resists: 'That was just a temporary measure for revenge.'Captain Gu leans in: 'We've planned everything, let's go with it. I'll help you take your revenge, and you just need to repay the favor.'A slightly silly Meng Yu asks: 'What favor is that?'Captain Gu smirks: 'The life-saving favor that should be repaid with oneself.'Meng Yu: 'Is this fox really the officer I knew in my past life?'

On the wedding night, she was tied to his bed.