Journey to the End of the Night - Chapter 15 - : How Did You Die?

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 a world where countless web novel universes collide, where soldier kings, mercenary overlords, god-tier tycoons, and even demons wage war against each other—where protagonists rise, seduce breathtaking heroines, seize endless opportunities, and battle for supremacy—there is one man who can suppress them all.A man who has finally crossed into another world.When he opened his eyes, he found himself in the body of a young man named Veil Lancaster.“A villain destined to be beaten to a pulp by the protagonist? Am I really just a side character?” Veil muttered to himself.But why should he accept that fate? His father held absolute power, his mother was a legendary business tycoon—what made the so-called protagonist superior to him?Fortunately, at that moment, he successfully awakened the Villain System.One day in the future—“Veil! You crippled me, stole my opportunities, and even took my woman! You damn villain! You’ll suffer divine retribution for this!”A protagonist roared in fury, coughing up a mouthful of blood.Veil smiled gently and said, “I didn’t do anything… This was simply your fate.”“A pawn has only one destiny—to be placed exactly where I want it.”Remember this.I, Veil Lancaster, only wish to be a charming and sinister villain.

After discovering about her wealthy husband’s affair, she humiliates the adulterous pair on the streets and divorces him the very next morning. Just as everyone anticipates her downfall, she goes on to marry the most brilliant bachelor in the nation whom her unfaithful former husband cannot hold a candle to!

The best way to declare war on a spy as an ordinary person is to become a spy as well.As a spy, if you want to go to war with a powerful espionage organization, join an equally powerful espionage organization.If you are unable to join any powerful espionage organization, then establish your own espionage organization and fight until destruction or victory.This is the war of spies, telling the story of how a group of ordinary people achieved extraordinary success.