MTL - Start the Source of Fire and Create a Mechanical Army - Chapter 31

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.

Until he became the lowest-ranked master, his lonely and luckless life never changed.

Suddenly one day, a descendant injected him with a nanomachine, and the machine started ‘speaking’ to him.

“What? What are you talking about?”

This was beyond the boy’s knowledge, he turned pale.

The Nanomachine linked to his cerebrum realized the User was not understanding a single word it said.

“Who are you, and why are you doing this to me?”

“Nano Mashin?”

The boy’s face hardened.

Mashin was the deity the Mashin Religion worshipped, along with the Sacred Fire.

The religions’ Master communicated with Mashin.

“Um, are you really Mashin?”

The boy knelt down and asked with a trembling voice. At this, the Nanomachine attached to his cerebrum realized it had been misunderstood.

The Nightmare BeginsDr. Emma Taylor, a renowned psychologist, had always been fascinated by the human mind's darkest corners. Her latest patient, a young woman named Sarah, suffered from terrifying nightmares that seemed all too real.

Uchiha Natsuki obtained the power system, revived Uchiha, and created the strongest force in the ninja world.

Exclude me Uchiha? Sorry, we quit!

Whoever the garrison likes will go!

“Kakashi, Danzo was the mastermind behind White Fang’s death and was connived by the Third Generation. You actually worked for Konoha!?”

“Itachi, this time I will awaken the Eternal Kaleidoscope for you.”

“Bai, your actual combat ability is too weak. Please enter the Tsukiyomi space to practice for a few years.”

Sorry, we Uchiha have kaleidoscope per capita.

Who can fight in a group fight these days? Get on my shoulder!

Otsutsuki is coming to destroy the world, but you are still striving to be Hokage. There is something wrong with you.

Danzo: “We must not allow Uchiha to gain power!”

“Sir, Uchiha Fugaku has resigned from his position as captain of the Konoha Guard.”

“???”

Third Generation: “The position of Hokage will never be given to you as Uchiha!”

“Hokage-sama, Uchiha has withdrawn from the Hokage campaign.”

“???”

“Sir! Uchiha has established his own country!”

“What!?”

“It’s not rare for us Uchiha to use a Hokage as a treasure. Let’s wait and use him as a target.”

ps: Hizashi did not die simply because he wanted Neji to have a father.

- Description from novelbuddy