Kujibiki Tokushou: Musou Hāremu ken - Chapter 36

During the Second World War, Kyle looked at Captain America standing straight and proud before him. Suddenly, a series of skill cards appeared.

「Pistol Master」

「Martial Arts Master」

「Shield Defense Master」

「Super Soldier Serum」

Which skill card do you wish to extract?

“Wait… what? This golden finger… you must be pulling my leg! Not only skill cards but I can also extract super-powered skills like the Super Soldier Serum? Mother of God… what is this?!”

- Description from Novelupdates

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 life, the most important thing is appearance.To compensate for his lack of good looks, he worked hard for years to reach the peak.However, the reality waiting for him at the end was nothing but betrayal and despair.[The system has been activated.][You have obtained the ‘Handsome’ attribute.]On the brink of death, he gets a second chance at life.Now his goal is clear.[Quest Completed]Reward: Talent obtained through the ‘Handsome’ stat.[New Quest]Task: Become more handsome.“I will become handsome.”

What if the balance of the world depended on a single awakening?In the ancient land of Bathalumea, a once-mighty civilization now fractured by time and turmoil, whispers of a forgotten power begin to stir. Haraya, the fabled ability to shape reality itself, was long thought to be a myth, buried alongside the sovereign bloodlines that once wielded it. But Haraya was never truly gone—it only waited.Now, as a new age dawns, the power begins to resurface. Across the sacred grounds of Bathalan, through the storm-laden waves of the Bagyuna Ocean, and into the shadowed ruins of Gintara, the resurgence of Haraya sends ripples through a divided world. The balance between order and chaos begins to tip, drawing the attention of powerful factions who see in it the key to domination—or destruction.Among them, a descendant of the lost power emerges. Haunted by tragedy and driven by the dream of rebuilding what was lost, they find themselves entwined with Haraya’s awakening. But as the forces of greed, fear, and ambition converge, they must decide: will they wield Haraya to heal a broken world, or will it unravel under the weight of those who seek to claim it?From the volcanic heights of Kaluyara to the enchanted forests of Aralyon, and into the unfathomable depths of the Diwang Abyss, Bloodline: Sovereign’s Awakening weaves a tale of hope, sacrifice, and reckoning. As ancient powers clash and the threads of fate tighten, one truth becomes clear: the return of Haraya may save the world—or destroy it forever.“Bloodline: Sovereign’s Awakening” is a tale of reckoning and renewal, where a power lost to time could unite a fractured world—or be extinguished forever, leaving its promise unfulfilled.