SpiderGwen: I have a system?! - Chapter 91 - : Back to the World of Avatar, Six Months Later

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.

A genius programmer creates the perfect AI girlfriend—only for her to become terrifyingly possessive. When an apocalyptic event threatens the world, she eliminates any woman who tries to recruit him to the cause. But when the villainess of the apocalypse takes an interest in him, will his AI love protect or destroy him?

In the peaceful Ning City, the Shen family had two lovely daughters. The elder Miss Shen, Shen Ru, was smart and capable, while the second Miss Shen, Shen Yan, was charming and beautiful.

One day, a third daughter, Shen Wan, appeared.

Shen Wan was quiet and unremarkable. She looked weak and helpless.

Mr. Shen said, “Let her stay.”

Mrs. Shen said, “A daughter born to a lowly woman is still lowly.”

Shen Ru said, “She’s too plain and simple.”

Shen Yan said, “Brother Qi dislikes unattractive things the most.”

Shen Wan coldly smiled and thought, Don’t worry, take it easy. None of you can escape!’

–

In her past life, Shen Wan lost all her blood, her organs were hollowed out, and she died on a cold operating table.

She lived thirty years without having any children.

In this life, she came for revenge. She carefully planned every step and turned Ning City upside down. But inadvertently, she drew the attention of a demon king.

The people respectfully called Quan Hanting “Lord Six”. He was cold and heartless, and his identity was a mystery.

[Little Cute Bundle]

“I heard that when I was born, Papa was in so much pain that he almost died. Yeah, Mama bit him!”

……………………………………………………………

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Lin Ke traversed to this world and, with the help of a system, utilized modern knowledge to farm and develop, claiming kingship and dominance.This is a world of professionals, a world of swords and magic, a world of bloodline inheritance, and a world of countless racial conflicts!One day, Lin Ke rode a bicycle with training wheels past the army, facing an endless enemy ahead.[Shield Warrior], [Arsonist], [Tree Shepherdess], [Wind Whisperer], [Thunder Sword Maiden], [Eternal Freeze Knight], [Voodoo Warlock]...Looking at the diverse group of followers behind him—tall, short, plump, thin, old, weak, sick, and disabled—Lin Ke laughed and raised his arm to call out: “[Workers]! Delivery [Knights]! [Scientists]! [Doctors]... Raise the flag of Azanen and charge with me!”Thus, amidst the eerie cries and howls of his followers, the history of the boundless planes was forever changed.