Naruto: Konoha's Kanpu - Chapter 38: There Is Still A Chance

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.

“One Generation Immortal Venerable” Luo Chen was attacked and reborn and returned to Earth.

He is an ordinary person, facing the contempt of his girlfriend, the ridicule of his rivals, the miserable life of his parents, and the threats and provocations of the rich and young.

He vowed to change the injustice of fate, stand on the pinnacle of this world, and tell everyone that Luo Chen had been here.

- Description from MTL

“You called me lazy, good. Watch me turn sloth into gold.”—Rino.***Rino used to be a boy who was betrayed by someone he trusted to be his intern, and left to die all because he believed in digital money. At just 18, his entire world laid into shambles when his intern retrieved the loan he borrowed, the bank seized all he had left with him, and worse, his father disowned him.That was when he died out.But fate had other plans.He wakes up in the body of Rino Carter, the “useless” son of a global billionaire who also believes in online wealth, but is termed lazy by everyone around him. Except this time, Rino has something powerful by his side...He awakened “The Throne of Gold System”.Not only did he awaken this system, Rino returned as another being of the same identity in a different timeline, and this time, he’s building an empire no one can take from him.He’ll conquer the world of money, crush his enemies and win hearts, with the system by his side.***“You see, money is power. And I? I have money.”—Rino Carter.

In the expansive expanse of existence, there exist realms concealed from the awareness of ordinary folk.Rain Weathers, an unremarkable teenager with average looks, physique, and grades, was leading an uneventful life.However, everything took a dramatic turn one fateful day when he found himself plunged into a vivid dream, a dream that unveiled a world beyond imagination — a world teeming with spirits, monsters, and conversing frogs.This was the Spirit Realm.Transformed into a player by the mysterious machinations of the universe, Rain, alongside other chosen individuals, found themselves thrust into a perilous world.They were tasked with navigating their newfound domain, establishing their territories, all while fending off relentless onslaughts from beasts, defending their territories from other races, and making sure to stay alive for another day.