Extra's Path To Demon King - Chapter 245: Oneself

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.

Born crippled with a rare disease, abandoned by his indifferent father, and hated to the core by his half-siblings, Xylen’s life was nothing but a tragedy.His mother died searching for a cure, and the only person who ever cared for him was cruelly taken away.Betrayed. Schemed against. Left with no way out.Lured into playing Fallen Realm Online with the promise of earning money for treatment, he fought desperately, doing nothing but living in the game and failing over and over again—only to be killed by his half-siblings right before completing a crucial quest. His reward stolen. His last hope shattered.With nothing left to lose, he ended his own life in the real world… only to wake up on the day the game was released.Armed with future knowledge, Xylen vows to seize this second chance. He will become stronger. He will protect the only person who ever mattered. And he will make those who wronged him pay.But fate had other plans.Instead of a normal start, he is forced into a demon fief as a baron—with an uncle who wants him dead. If he fails to kill his uncle and defend his land, his character will die, and he will be permanently banned. Worse, he is given a race despised by both NPCs and players—and given a class that should not exist.A mystery, fearsome, and despised character to the world. Feared by gods and demons alike. A walking catastrophe in the making.Yet, the more he learns about his new power, the more he realizes…This is no curse. This is his greatest weapon.And when the world finally learns the truth about Fallen Realm Online?Xylenia will be the name that shakes reality itself.

“At thirty, a rare age in the past, and when the King of Hell doesn’t summon you, you go of your own accord.”After his divorce, Lu Liang suddenly felt as though the dirt was already up to his neck, especially when he could hear the sound of a running memorial lantern.Until he discovered that it was a message from the future, and that’s when his life took a dramatic turn.…Living in this world, we are all mere mortals.Being a mortal isn’t so bad—greedy, lustful, cunning, selfish…

Hyperthymesia. Those with this condition can remember every detail of their lives from something as significant as the world’s turning point to something as small and as insignificant as a minor fleeting thought. They cannot forget and their thirst for knowledge allows them to be considered genius in some senses.

Legend has it that Ji Yushi was this kind of genius.

In addition, it was said that he was gay and very beautiful.

As soon as the news that he was going to support Tianqiong’s seventh squad broke out, it sent everyone buzzing.

Everyone knew that the captain of the seventh squad, Song Qinglan, was a hoodlum and deeply homophobic.

He not only relied on his super-powerful abilities to become the dark horse on the battlefield in less than two years, but he also hates it when those at the top forces a flower vase* into his squad.

Sure enough, Song Qinglan announced in front of everyone, “Useful? Us brothers are going out there working ourselves to the bone, we don’t need a little genius who can only speedread quantum waves!”

Later.

The squad was forced into a dire situation during their mission.

That beautiful little genius calmly continued, every gunfire hitting the mark, his fighting power peaking.

Song Qinglan begged in front of everyone, “Adviser Ji, stay.”

In the end, he added, “I’ll work myself to the bone for you.”

*****

Ji Yushi had a secret.

He would often be awake at night, suffering from memory overload and recurring nightmares.

There was only one thing that could let him fall asleep peacefully.

And that was Song Qinglan.

*Flower vase: Someone who only looks pretty but can’t amount to much