Childhood Sweethearts: He's Jealous Again! - Chapter 82 - So That’s How It Is

5 years after the world changed, the final boss appeared.

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.

Junpei Takeda, a high school student, is childhood friends with Noriko Tatsumiya and is bullied by Kido Shouta. One day, while bullying Junpei, they (Junpei, Tatsumiya, & Shouta) were suddenly summoned to a different world by the whim of “God”. Summoned Heroes with cheats, or so he thought. But it turns out Junpei’s stats were even worse than an average farmer. Tricked into a deathly labyrinth by the only one he trust, he walks the journey for revenge.

After waking up, Su Mu found himself in a Three Kingdoms game beyond reality, and became a low-level farmer NPC who was recruited by the player’s village.

The Three Kingdoms were in troubled times, and the wars were endless.

The safety of the farmer NPC cannot be guaranteed in the slightest.

Fortunately, with a unique talent, Su Mu, who was adopted by Bai Fumei players//raised, can change jobs infinitely!

Turn 1 [militia], turn 2 [archers], turn 3 [spearmen], turn 4 [heavy armor sword], turn 5 [black cavalry], turn 6 [generals], turn 7…

Unlimited career transfers, unlimited enhancements!

When the game and reality are connected and the supernatural comes, Su Mu has already become a mythical general who can beat the world, unifying the game and reality, and creating his own supreme fairy garden!

- Description from novelbuddy