Chronicles of the True Wizard - Chapter 58:Book 1 - 57

The ancient continent of Wu is a place where cultivation is law and the strong reign supreme. Thousands fall to their knees when the strong appear, and rivers of blood flow when they’re angered.

A peak expert known as Xie Di fell and was reborn in a young man beaten into idiocy. He lost all of his memories and his cultivation was crippled, causing him to be despised by all. To rid his shame and fight against the destiny of being toyed by others, the young man cultivated with all his strength, killing experts, and splattering the whole country with blood. All until the day he becomes a martial god who shatters the firmament and scorns mortals.

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.

Garou woke up in the world of Naruto, reborn as an ordinary civilian of the Hidden Leaf Village.To his shock, he discovered he suffered from the same limitation as Rock Lee: completely talentless in both ninjutsu and genjutsu. Worse yet, he belonged to the same generation as Naruto and the other members of the Konoha 12.But Garou wasn’t the type to quit. He knew that pure grind beats natural talent.Might Guy had already proven that much.However, unlike Guy, Garou had seen the end. He had watched the anime.He understood that taijutsu, as powerful as it was, always burned out like a firework, brilliant but brief.And this time, he had no intention of going out like that.Determined to break past the limits, Garou began creating his own techniques, pushing the boundaries of what a “mere” civilian could achieve.And the mysterious light orb in his mind granted him powers based on the influence his techniques had on others and the world itself.The world of Naruto would never be the same again.The grind doesn’t stop until the world bows before his fists.

“Welcome to Perfect Life Simulator!”

“You can choose to simulate your own life or someone else’s life to find solutions to many life problems!”

…

A watch handed down from his deceased parents allowed Su Wu to start a future life simulator.

He thought that he could really use this simulator to lead a perfect life without regrets, but unexpectedly things developed in another direction.

In the future, as long as there is light, there will be evil spirits that kill people;

Hanging in the sky and covering a city, it leaves a city without red lanterns of living people;

The scarlet eye that can use a mobile phone to spy on the specific location of others…

Will such a future really come?

…

“you are dead.”

“This simulation is over.”

- Description from novelbuddy