Mr. Pretentious: Miss Valerius, He is Begging for a Title - Chapter 94: Trouble—Master Ford’s Injury Is at His Waist

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.

In the 5th year of Konoha’s founding.The battle between Hashirama Senju and Madara Uchiha at the Valley of the End had come to a close.In order to treat his elder brother’s injuries, Tobirama Senju resurrected a medical ninja from ancient times, hoping that this individual could prevent the injuries from shortening his brother’s lifespan.This medical ninja’s name was Emiya Shigen.

Greg watched his world come to an end under the hands of the enemies supported by his fellow species. while blaming himself for not starting the game early or not investing into, or for awakening a trash talent he close his eyes and embraced dead but that was not the end of his story as he regressed to ten years prior to the unfortunate event. with knowledge of the future and determination he buys a gaming helmet and plunged into the game- Apocalypse that signalled the start of something more. with his knowledge of the future, his skills that made him shine even with his trashy talent and the awakening of an ex rank talent, 100% Dodge rate that makes attacking him impossible, read Greg's revenge and rise to the top protecting those he cares about while punishing his enemies

He swore that if he was given a second chance to live, he would live his life to the fullest.His life was full of misery but he was reincarnated in the body of the son of the strongest expert in the empire.He had the looks, wealth, and women. He was known as the “Handsome Playboy” and he didn't want to become a righteous protagonist.He awakened a system that can make him strong by making others feel the 7 sins towards him.He will collect many beauties and live to the peak of life.