Fatal Strike: Mercenary Road of Gunfire Ranger - Chapter 2 - Investigator

Great Cultivator Chen Fan had failed his Tribulation period, but after a dream, he had returned to Earth, when he was young, five hundred years ago.

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.

The world experienced a cataclysmic change, and countless spatial gateways appeared out of thin air.

A hundred years ago, the blue star world fell into an endless abyss, and the era of abyss lords for all began.

Become the lord of the abyss, expand the territory, and resist the invasion of the abyss. The lord is hope, and the lord is destiny!

A hundred years later, a boy who has obtained a soul-entry talent, a treasure chest, a resource crystal, and a summoning scroll, will be perfect after ten consecutive draws? Hundred consecutive draws will produce legends?

What are you waiting for?

Wu Feng, who became the will of the abyss, was interviewed: “I really just didn’t want to lose my status as a lord, so you believe me!”

When you gaze into the abyss, I am the abyss!

———————————

Readership: 892119197.

- Description from novelbuddy