Terminally-Ill Genius Dark Knight - Chapter 168

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.

The Age of Gods has long since ended, their voices no longer heard on the continent of Douluo. Humanity, standing on the shoulders of legends from its history, advanced soul technology to inconceivable heights. The humans of Douluo invented weapons of mass destruction, mechanized armor, and living metals. With these advancements, they went on to conquer the oceans and discovered two new continents. To fuel these new technologies, humanity hunted the soul beasts to the very brink of extinction.

Once the dominant force of Douluo, the few surviving soul beasts now hide in the darkest recesses of their last sanctuary. The weakest have all been hunted, leaving only the strongest to scheme in the heart of the forest. The soul beasts, not willing to fade away, plot an uprising for their survival. In the midst of this, a god from a long forgotten era awakens in the depths of the Great Star Dou Forest to seek vengeance for the soul beasts.

As darkness encroaches from the abyss, hope is found in a young boy who holds a power beyond divinity within himself—Tang Wulin! Hope for both humanity and the soul beasts, as the bridge between the two. He finds his way into the fabled halls of Shrek Academy, where he learns to wield his prodigious powers, makes friends and finds allies, eventually rising to become a towering leader.

As he learns to harness his strength, danger lurks within the shadows as the various factions of humanity maneuver and plot to usurp Shrek Academy. Tang Wulin discovers the threat to the only world he knows as he sinks deeper into the intrigue. Meanwhile, camouflaged by the chaos and unbeknownst to the humans, the soul beasts’ plot continues to steadily advance.

To defend what he loves and reclaim what was lost, Tang Wulin must seek out the legacies of legends past and unlock the full might of the Golden Dragon King!

To survive, the unfortunate Gong Qiying, who became the lord of the Sein Dungeon, had to make his dungeon extremely “hellish”:Doors that “cannot be opened from this side”,treasure chests “triggering teleport traps”,a three hundred and sixty-five mile journey from the starting point to the BOSS room with no place to rest,monster knights with great bows on either side of a narrow bridge,and sinister ambushes around corners.There's also unavoidable visits to poisonous pits and hidden paths...Additionally, well-known fighters like Isshin Ashina, the Furnace Knight, Rajang, and the Scourge Legion bring unexpected surprises!Various unique rewards such as the Flaming Sword, Murky Hand Scythe, Rapid Slash Longsword, Sacred Oath, and Flame Empowerment will make you too happy to contain your joy!Gong Qiying: The most important thing in my dungeon is to ensure adventurers have fun!

Looking at the desperate survivor surrounded by zombies under the high wall, Tang Ye opened his hands and shouted: Welcome to paradise (Welcome to heaven)

- Description from novelbuddy