Dimension System: SSS Rank Talent Awakening - Chapter 236 Trial by Ice

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.

“I will have my vengeance, in this life, or the next!”Albedo died alone and depressed and was reborn in a Novel he had been reading. However, instead of becoming the Protagonist or Antagonist, he becomes Albedo Neverwinter, an Extra he couldn't even recall from the Novel.However, the cruelty of life didn't change even after rebirth, and his new family was ripped away from him, leaving him with nothing but scars as reminders of the gruesome fate his family faced.Promising to get his revenge, watch as Albedo, alongside his System, his tactical mind and scarce but valuable future knowledge, rises up the ranks and ascends the pyramid of power.[ OP MC, System, Harem, Romance ][ Yeah there will be Smut, but it won't dominate the Novel ]

An Hao leaped, thinking she had died, but to her surprise, when she opened her eyes, she found herself back in the year 1985. To live a second life, did she have to endure the abuse of her stepmother and stepsister again, the dislike of her mother-in-law and disdain from her sister-in-law, and the betrayal of her best friend who bravely became the other woman just to slap her in the face and climb the social ladder? Was she supposed to end her miserable life in poverty again? An Hao's answer was, “Eat! Shit! No!” She was determined to make something of herself, to get rich by capitalizing on her knowledge and aim for a well-off life. This time around, she was going to be the protective big sister who reformed her worthless little brother who had died a wretched death, and the virtuous wife to make up for her past neglect of her husband! She wouldn't let this life go to waste in despair! A malicious best friend? Coveting her man? Not a chance! Go hang out wherever it's cool! Cough cough, how did she not realize in her past life that this “Stoic King of Hell” was so indecent. Decent? You've had your fill of decency during the day.