Lord of the Oasis - Chapter 611 - The Necklace of Eternity

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.

Awakening to a post-apocalyptic world infested with zombies and mutated monsters, Alex makes a startling discovery: he possesses a system that grants him access to unlimited resources every day.【Congratulations, you've received unlimited bottled water.】【Congratulations, you've received unlimited 9mm bullets.】【Congratulations, you've received unlimited cold medicine.】...With each system notification, Alex's chances of survival soar while others struggle to stay alive.As everyone else fights for their lives, Alex finds himself living in luxury, residing in a lavish mansion where he leisurely sips red wine and savors grilled delicacies amidst the chaos of the end times...

Qiao Shao, who worked hard to stay up all night and study, was first in class — if you count from the bottom.

He Ruge was addicted to “Your Exclusive Lover” this love nurturing game. Captivated by the attractive military uniforms person, whose original form was a White Tiger Male God.

When the game came to the end, He Ruge suddenly become a mermaid and transmigrated, and he was even the legendary Koi Mermaid with flourishing beauty, charming singing and exceeding good luck?

The place where he fell was even more unusual – the bathtub of the Male God!

___________

The federation’s Xi Guican, a man whose stamp of his foot could make the whole intersteller tremble. During his recuperation, there appeared a love game that could not be deleted from the optical computer.

The plot of the game was his secret past. In this love game, he returned to the experimental days of No. 20, allowing people to slaughter and bully him, there was only one variable.——

It’s his exclusive lover.

The love that came from the light, taking him out of the dark.

- Description from Novelupdates