Advent of the Three Calamities - Chapter 11: Vision [1]

only led to his death.But fate had other plans.Reincarnated as the son of the strongest being in existence, the Demon King. One might expect him to resist, to rebel against the Demon King and kill him once and for all.But why bother?Being the good guy led to nothing but betrayal and death. This time, he'll live for himself. Women, pleasure, power—he will claim it all, as any true demon would.

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.

Ethan's head throbbed violently as he opened his eyes, his vision hazy and unfocused. A dull ringing filled his ears, drowning out his thoughts.“What’s happening…?” he thought, his mind sluggish, struggling to catch up with reality. One moment, he was asleep—or at least, he thought he was—and the next, searing pain forced him awake.His vision swam, shapes blurring together in a disorienting mess. But then, muffled noises filtered through the haze—frantic, panicked sounds. Someone was trying to scream, their voice smothered, choked by something.A cold shiver ran down his spine.As his sight gradually sharpened, Ethan's breath hitched.He was on all fours, looming over someone. A girl.Her body twisted and writhed beneath him, ropes biting into her wrists and ankles. Her mouth was gagged, muffling her cries. Her wide brown eyes, brimming with fear and fury, glared up at him.Ethan's body locked in place, his blood running cold.“What the…?” His mind reeled, thoughts slamming into each other in chaotic disarray. “What kind of bizarre dream is this?”Panic clawed at his chest. His breath came in ragged, uneven gasps as he scrambled backward, only to realize his limbs felt sluggish, uncooperative, like they didn’t belong to him.“Is this… is this some kind of twisted fantasy I never knew I had?” A sickening thought slithered through his mind, making his stomach churn.The girl's frantic squirming slowed for a moment, her gaze flickering with confusion as she took in his expression—his trembling hands, his wide, horrified eyes. But the fear returned just as quickly. She struggled harder, her body arching, her muffled screams rising in pitch.Ethan wanted to speak, to say something, anything, but before he could force out a word, a glowing blue window materialized before his eyes.His breath caught.A translucent, hovering screen?“What…?”Lines of glowing text scrolled across its surface.---[System Activated…][Host Confirmed.][Simulating Previous Data…]Ethan awakens in a mysterious world, shackled by a curse that clouds his judgment and drives him toward choices he never wished to make. Burdened by guilt and responsibility, he must navigate the fallout of his actions while unraveling the truth behind the curse—and his place in this enigmatic new reality.

Once Gu Qingjiu, she was fortunate enough to be born in the “best” family, ended up having a miserable and unjust life.

Reliving her life once more, Gu Qingjiu chooses to enlist in the military and bear the toughest hardships she has ever faced. Everyone says that she’s the least possible person to join the special forces. However, she manages to prove all of them wrong.

Good-for-nothing? Who’s the good-for-nothing? Is she a good-for-nothing when she can throw all of them onto the floor in a fight? Is she a good-for-nothing when she has results better than everyone else? She’ll prove all of them wrong.

Enter Helian Niancheng, the well-known, youngest major-general in Beijing. A banishment sends him into the basic ranks in a military camp as a new recruit. From then on, he meets a person that makes him dote on and protect at all costs, his beloved. However, his beloved is only focused on fighting and killing. Major-general Helian declares this to be a very bad, a very terrible situation. Yet, Gu Qingjiu merely replies,

“Scram! Lower your gun if you dare!”