After Pretending To Lose All My Money, I Learn Of Human's True Nature - Chapter 28

Born as twins, but Mu Qiqi was left suffering every torment and became the greatest scapegoat in history only because she was not a better actress than her sister!

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.

Karl, a young man stuck in a rough patch after losing his job and burning through almost all his savings, wandered through the cold, dark streets of Eldoria. On the damp, silent sidewalks, he stumbled upon something bizarre: an old gacha machine mysteriously appearing at every corner he turned, almost as if it was following him. Driven by a mix of curiosity and the overwhelming weirdness of the situation, Karl finally gave in and used his last bit of money on the machine. From the gacha ball, he pulled out a card with a barcode.Back in his cramped apartment, curiosity finally won over caution, and Karl scanned the barcode. To his shock, an app called “Common Sense Manipulation App” installed itself on his phone, claiming it could alter people's “common sense.”------Support Me By Gifts or Power Stones-----

“Your Majesty, the pirates are coming!” said a soldier in panic.

“Don’t worry, let the ninja assassinate the tactical troops to solve them.” Pulkit smiled.

“Your Majesty, the naval fleet came over, the leader is the three Admirals!” Another soldier panicked.

“Three Admirals? Let the Kenpachi Zaraki team handle that.” Pulkit smiled.

“Your Majesty, the Four Emperors came to attack!” Another soldier panicked.

“Don’t mess, go and call the dragon!” Pulkit smiled.

“Your Majesty, the revolutionary army united with the world government and the world’s pirates all over!”

Another soldier was alarmed. Pulkit wears the Pluto God clothes, pick up the sword around, his eyes turned into Rinnegan, stood up and sneered, “just right, today they will be wiped out.”

- Description from Novelupdates