Dragonheart Core - Chapter 83: Fourth Sun

Born as the daughter of the last martial artist of this era, that is Yeon. Her father is the world’s greatest fighter and is respected by everyone. The only problem was…… “I know it’s impressive, but I don’t have to follow in his footsteps, do I?” Her stubborn father’s dream was for his daughter to also follow the path of martial arts. Naturally, Yeon’s life was filled with grueling training. Living a dull life, Yeon’s only hobby was reading romance fantasy novels before going to bed. “If only I could live as a lady once……” After making a wish, Yeon fell asleep and entered a novel as if she were dreaming. However, her enjoyment is short-lived when she realizes that it’s not a romance fantasy, but rather a martial arts novel. “It was my dream to be a possessor, but of all things, it had to be a martial arts novel, and in the body of a supporting character who dies early!” Feeling indignant and weeping, she suddenly notices her own reflection in the mirror. It was a glamorous image. ‘Hold on. Does this mean… I could become a lady?’ Moreover, in this world, there was a man who looked exactly like the male lead in her favorite romance fantasy. He was handsome and talented, but with a wretched backstory. “Things are going to be different now.” The fate of a supporting character who dies early? Forget about it. Whether they’re followers of the devil or a heretical sect, even the worst villains don’t scare her. Why? Because she is the strongest possessor in history. This is the story of Yeon’s adventures in the martial arts world, as she stumbles along in pursuit of everything she desires.

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.

Betrayed. Broken. Abandoned. When Athena is cast aside for Jesse’s former lover, she loses everything—her mate, her pack, and her unborn child. Left to die, she’s rescued by Kieran, a powerful rogue Alpha who turns her into a warrior. Now, she’s back—not for love, but for vengeance. But as war ignites, so does an unexpected bond with Kieran.

Standing before you is:The overseer and protector of darkness,The subverter and remolder of order,The creator and persecutor of bootlickers,The supreme actress and drama queen, the goddess of the night, the nightmare of gods and the gravedigger,The true ancestor of blood—Charlotte de Castel.Accompanied by madness, born from blood, hand in hand with curses, walking with destruction.This is a legend belonging to the bloodsuckers…[Transformation][Rare-bloodline][Lord][Kingdom-building][Behind-The-Scenes][Deification]