Naruto: I'm Nine-Tails and My Host is Kushina - Chapter 193

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.

This is a cliché story about two young people saving the world.

Bai Fan was a Chinese medical university student who woke up as a Japanese high school student named Kitagawa Tera about half a month ago.It was just like a typical starting point in a novel. He re-experienced life as a high school student in his twenties. Youthful, energetic girls, and colorful love comedies…That should have been the original plot…However, heaven was obviously playing a joke on Bai Fan as he had not inherited any memories of the original Kitagawa Tera.Follow the level-headed and cold Kitagawa Teru as he navigated around his new world with the ‘System’ that constantly gave him supernatural quests to clear.