First Immortal of the Sword - Chapter 1124 - Anticipating a Lord’s Return

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.

Seventeen-year-old Hajime Nagumo is your average, everyday otaku. However, his simple life of pulling all-nighters and sleeping in school is suddenly turned upside down when he, along with the rest of his class, is summoned to a fantasy world!

They’re treated like heroes and tasked with the duty of saving the human race from utter extinction.

But what should have been any otaku’s wet dream quickly turns into Hajime’s nightmare? While the rest of his class are blessed with godlike powers, Hajime’s job, Synergist, only has a single transmutation skill. Ridiculed and bullied by his classmates for being weak, he soon finds himself in despair.

Will he be able to survive in this dangerous world of monsters and demons with only a glorified blacksmith’s level of strength?

The war between justice and evil has lasted for thousands of years.

The evil alliance headed by the five-color dragon is retreating steadily in the war against humans.

The old continent has been lost, and the five-colored dragons have retreated to the new continent to survive. The human side has won a great victory. At the point of the long sword, the evil race is defeated and defeated.

Plains, mountains, seas, ice fields, underground, deserts, plateaus, forests, all the places in the world that can stand, there are human beings everywhere.

Even swamps, a world where human beings cannot live at all, are decreasing day by day under the persistent policy of human beings to fill in swamps and reclaim land.

In this moment of despair.

In the dark swamp, three dragon eggs left behind by a certain female black dragon in order to escape slowly hatched.

…

Ace wakes up from the darkness and learns that he is about to face a dire situation for the entire human world.

Rack your brains to survive.

Rainforest grafting, swamp planting, absolute militarization, exhausting all methods to farm desperately to improve combat effectiveness.

In the face of the enemy, you can’t be soft, your genes are deteriorating, your will is weakened, and you can eat away at every step.

Hundreds of years later, the black wings covering the sky enveloped the world, and tens of millions of dark legions rushed towards the human world like a tide.

With a population of tens of millions and three million soldiers, the empire is left with only a dying force, which is overwhelmed by the tide-like army of monsters.

The millennium-old empire collapsed, the sculptures of heroes turned into dust, and the magnificent temple was burned.

Among the ruins, the world crowned Ace.

Readership (anyone can apply)

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- Description from novelbuddy

One day, I was summoned to this world.