Mr Bodyguard, Protect Your Heart! - Chapter 21: HAPPY INDEPENDENCE DAY

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.

In the age of the Warring States, the world is at war!

At this moment, a great empire is about to be established, and at this moment, this empire is at stake.

In this vast world, Young Master Qin shouted loudly, “I want this great Qin Wanshi–!”

- Description from novelbuddy

A woman with heavy makeup said, “My husband's net worth is over a hundred million, and all I need to do every day is go shopping for beauty treatments. I don't need to work at all!”

Suri Drew said, “Hmph, my husband's liquid assets alone are a billion. Did I mention it?”

A sexy lady said, “My husband is a master of judo and karate. I feel so safe with him!”

Suri Drew said, “My husband can take down ten strong men with his bare hands. It's just a piece of cake.”

Ding! Congratulations to the host for obtaining one billion in funds.

Ding! Congratulations to the host for acquiring top-notch combat skills.

Wife's boasting all became a reality.

Yigol Novak is a bit panicked as he said, “Honey, if you keep bragging, the entire blue star will be mine...”

……………………………………………………………

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Felix was reincarnated as Lindarion Sunblade, a prince of Eldorath, destined for greatness—or so they say. In a world where magic, swordsmanship, and archery reign supreme, power is everything, and the strong shape history. But strength isn’t given, it’s earned.With a System awakening within him, one that pushes his limits with deadly quests sometimes, helps him with skills, and helps with forging weapons into legendary artifacts, he refuses to be just another noble in a gilded cage.Trials await, enemies lurk in the shadows, and even among his own kind, power breeds conflict.But he will rise. Not just as a prince—but as a ruler, a warrior, and a legend over the entire world.