Starting from the Planetary Governor - Chapter 1058 - 578, Capturing the Protozoan

In this world, human are in peril. 72 Obelisks suddenly appeared out of nowhere, infecting the world with Monsters. Amongst this chaos, people look for hope.

A man named Basil Pacifer is the humanity's hope. He is the strongest Mage alive at that point. Sadly, he believes in no man, and he always moves alone.

...

Basil observes the unfolding scene bitterly. He is aware of his impending doom, however he has no grudge. He has lived long enough to achieve things people can only dream about.

Looking back to his past, he realized his life is nothing more than a sad story.

Closing his eyes, he accepted his end — or so he thought.

...

”Look at me! What do you see?“

”Regrets.“

”Don't you want to undo it?“

”Tell me what the offer is.“

Thus, Basil Pacifer returned to the past, being his younger self once again. Of course, he returned back with something.

...

[Ding!]

[Guide to Omniscience is successfully merged with The Chosen One]

[Analyzing The Chosen One's mental capability...]

[Analyzation Complete!]

[Result: The Chosen One is retarded]

[Initiate Brain Configuration!]

No matter how useless the golden finger he received seems, he will reach a higher height than his last life. This time, he will completely erase any regrets he has!

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.

“If I don’t die… I swear I will act on all my evil thoughts..”

Not exactly everyone’s typical thought when they’re about to die. What will a cowardly young man do when reincarnated with the evil powers to redefine his destiny? Can the natural kindness of human nature triumph over evil? Will he become the cold-blooded demon king of legend, or will he forge his own path and rain down another kind of terror?

- Description from novelupdates

I wrote a book once.It was an unhinged fantasy born from my high-school brain, driven by loneliness and too many hormones.It was a world of beastmen, wild freedom, and the kind of romantic attention I could never get in real life. I poured every impossible desire into it: adventure, danger, and yes… a 'lot' of handsome partners.Before I knew it, I had a thousand chapters of pure escapism and pure thrill.Then on a college camping trip, I fell off a cliff.I expected to wake up in a hospital room but nope. I woke up on a soft field of grass, with air too fresh to belong anywhere on Earth.And then something moved behind me.Sticking out of my tailbone was... A tail.My tail?Yellow and black stripes and very, very real.I touched it. Completely real.My ears? Also gone—well, moved. They were now perched on top of my head like a confused jungle cat. And the outfit? Quite revealing, made of animal hide which matched my tail.What was going on?At first, I thought it was a prank. Or a dream. Or maybe karma is finally cashing in. But the more foreign memories evaded my mind, the clearer my situation became.This wasn't cosplay and it wasn't Earth, either.And—surprise—it wasn't even the world from my own book. Welp.I had been transported into a completely different Beastman world as a beast girl called Arinya.Sounds fun, right?Well… it would be, if I weren't apparently the ugliest duckling in the entire freaking savannah! Rejected by every potential mate I stumbled across and sneered at like a freaking eyesore.This was not how I planned my fantasy to come to reality.Trust me—if this is my fantasy come true, then someone needs to fire the author.But then again, after entering this world, I'm suddenly... Attractive.I mean, there's no change to my face and the freckles are still there, but for some reason, handsome beastmen begin to flock around me, because I smell... Pleasant.What's that all about?