MTL - Ask Sword - Chapter 649 pearl

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.

Kim Hyun Woo lived the life of the wealthy thanks to his parents. But one day, he received a phone call informing him of a traffic accident which involved his parents. His father had died and his mother was hospitalized in critical condition. The normal life he once knew, collapsed…

They sold their house, cancelled various insurance plans, and moved to a one room apartment. And after a few years, Hyun Woo spends four to six hours tending to his mother and worked to pay for her medical bills.

One day, one of his Instructors recommended him for position in a company called Global Exos, who made an announcement of making history with the newest technological invention.

(*NO RAPE*)Kitanna stood still, not worried about the new person; she was worried about herself. The royal guard was shirtless and standing so close to her, with his body pinning hers. She was still trying to get her thoughts straight when she found herself being dragged onto the bed, with the guard on top of her. She raised her hands to push him, but he was faster. He caught both of her hands with one of his and pinned them above her head, using his other free hand to cover her mouth.Kitanna felt blood rush to her cheeks, and the next words she heard sent her world spinning in 3D.“Now, moan, princess...” Those words brushed against her ear, causing the hairs on her neck to stand..........Set in historical times, in the ancient kingdom of Morado. A young princess, Kitanna, enjoys life to the fullest, living every day like the princess she is. But after an incident, she is left to only trust herself and her instincts in the palace, which was filled with betrayals and corruption.A guard, who was trained to protect the crown, lived his life peacefully, killing when he was ordered to but never speaking to people around him until he crossed paths with the sassy and clumsy princess. Then everything changed.