The Infant Whose Heart, Bones, and Eye Were Taken:Cultivating into a Demon - Chapter 87 – Cold Ice and Fiery Flame, Twofold Flower

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.

She became the supporting character ‘The First Empress’ in the webtoon . This is Empress Livia, who died young after being shunned by her emperor due to her timid personality and incompetence. Her problem is that I woke up at her funeral in Livia looking ‘just like’ her. Everyone praises me as the ‘resurrected empress.’ But only the emperor knows. That I am not the real Livia. “The crime of desecrating the empress’ coffin. She deserves the death penalty.” She wants to kill me. She offered him her deal. Just to live. “your majesty. I am a very useful person. “Please use me.” Let’s just hold on for one year. Although her husband is so so so so scared! The real heroine and ‘second empress’ will appear. Then I can leave the palace in peace. * After many twists and turns, the time was ripe. I told her husband. “As promised, please divorce me.” My husband stared at me. And he hugged me quietly and said, “no way.” “yes?” “Now what? “I can never let you go.” … Isn’t this it? Is it because the empress worked too hard? You want a divorce without obsession? No, I have to divorce?

In the mysterious MMORPG 【ExoGenesis】, the extraordinary age of transcendence has arrived on Terra. Tristan is reborn on the very day the game launches, awakening an SSS-level talent: the Sniper God.[Sniper God (SSS-Level)]- Effect 1: All ranged attacks are guaranteed to hit, and the damage type is changed to true damage.- Effect 2: For every meter of distance from the target, damage increases by 10%.With such an overpowered talent, Tristan’s choice is clear—he becomes an assassin!With deadly precision and the ability to strike from miles away, Tristan proves that an assassin doesn’t have to fight up close.

Han Yue Ling, a peerless beauty with a great personality, but she carries a lot of secrets.She loved a man for 10 years, but on the day of her wedding, fate decided to play a cruel joke on her and take the man away.Three years later, she decides to move away.She stumbles upon Lu Tian, the ruthless and cold CEO of Lu Corps. Thinking it was just an accident, she stumbles upon him again and again. Before she knew it, the man is already living with her!Is this an unexpected second chance at love? Will she be able to love again?