MTL - Immortal Emperor: Reborn in the Mixed City - Chapter 5782 Breakthrough to the Supreme Realm

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.

[Ilyasviel completes the check-in and rewards himself for a height increase of 1cm]

Elijah: “???”

[Shizaki Kuangsan completes the task, rewarded with a historical video of Shizaki Kuangsan, please accept it! 】

Tokisaki Kurumi: “???”

[Fit Testrosa completes the quest and is rewarded with a whole set of bombardment flow for making friends with Takamachi Naiba! 】

Fett: “???”

[Shiroi Kuroko completes the task and rewards Misaka Mikoto Ai’s bento! 】

Shirai Kuroko: “…!!!”

Chu Chen silently watched the group of system hosts who had been playing with the system he created to the point of collapse, and drank tea very calmly.

“You don’t really blame me for the rewards you get. I’m only responsible for the system delivery system. You blame me for being like this…”

- Description from novelbuddy

Cheated on by her fiancé weeks before their wedding, Sara, vowed to never love again. Men could not be trusted, especially with a woman's heart. She had made the mistake once, and that was more than enough for her. Never again would she make the same mistake to give her heart to another.But her resolve began to waver when she came across her new boss, Alexander Legend, a man whose reputation in his expertise and ruthlessness in business preceded him. Respected and feared by many, but to Sara, he was an annoying pest she wished she never met. Too persisted for her liking yet, she finds herself falling, slowly melting in his presence. Getting used to his stolen kisses and hugs and sometimes anticipating them.°°°°°Excerpts“You will fall for me, Sara. One day, I'll have your heart too,” Alex drawled. His voice had a seductive allure that had her heart racing. The fact that his hand was leisurely resting around her waist didn't help her either.“Try as much as you want to,” despite her body begging for his touch, Sara was determined to reject him today and any other day. She couldn't make the same mistake again. “You won't succeed in your seduction. NOT NOW. NOT EVER.”Alex smirked, kissed behind her ear and her body trembled, much to his satisfaction. That was all he needed to keep purising the stubborn woman in his arms right now. “We shall see, Miss Ambrose,” he cooed and then released her. He returned to his seat and asked in a professional tone. “What is my schedule for today?”