The Gate Traveler - Chapter 24B3 - : Barbarians at the Door

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 magical girl who made the wish of “destruction of this world” came to Ke Xue’s world, and Kewpie became a little Kewpie.

Being chased by someone holding a knife at the beginning, Shuangyue fell silent.
In a world without witches, how would she purify her soul gem?

Originally, he just wanted to be a good and hard-working employee in the winery, but the old man always liked the whole brainwashing operation. Suppressed by the world consciousness, for her own pure land, Shuangyue decided to go to his red square and black square, she would smash the dog world consciousness.

The protagonist is not a good person (highlighted), the three views have been distorted in the magic circle world, not a red square.

Little Cupid: You are my magical girl, and I am your Cupid.
————
Rescuing Matsuda Cat and Jingguang Cat, the protagonists directly built a gray empire for Jin Jiu and Sister Bei.
Hagihara and the squad leader are still dead, because the protagonist was not there at the time.
————
Do not dismantle the original cp, bring your own cp (but there is no obvious emotional line).

Content Label: Teen Conan
Search keywords: Protagonist: Frost Moon Saya ┃ Supporting roles: Gin, Zhufu Jingguang, Matsuda Jinping, Edogawa Conan, Maorilan, Kayao (Shirazawa Nozomi), Little Cupid (Ruby) ┃Others:

- Description from novelbuddy

worlds and transform into the ultimate badass! I'm aiming for 1,000 chapters by the end of next year!! Join me on this journey!Meet Alex, a 28-year-old loser and internet troll who spent his life glued to his PC, binging anime, games, and movies. His story comes to an abrupt end… or so he thinks. Instead of a peaceful afterlife, Alex wakes up in the Fantasy Realm, a chaotic universe where different fictional worlds collide, and survival is anything but guaranteed.This fanfiction is inspired by Terror Infinity, Reincarnation Paradise, and The Ultimate Evolution.Explore Iconic Worlds: Dive into your favorite fictional universes like One Piece, Hunter x Hunter, Naruto, Harry Potter, Lord of the Rings, Mass Effect, and more!A Unique Cast of Characters: Follow a small but very diverse cast with unique abilities that set them apart from others. Expect a small, growing harem where every member is meaningful! No “trophy” waifus here. Each character remains integral to the story.A Relatable MC: Meet a realistic, flawed, and fast-growing main character who faces relentless trials to survive. Will he sacrifice his morals for survival? The Thrill of Progression: Experience the thrill of getting stronger, mastering new skills, and surviving deadly missions and battles. Watch how the main character collects rare and powerful items, each with unique strengths, weaknesses, and requirements.For those interested in the specific worlds. Warning Spoiler:First arc: One PieceSecond arc: Final Fantasy 9Third arc: The PurgeFourth arc: HxHCurrent arc: Harry PotterConfirmed arcs: One Piece (revisited), Naruto, Harry Potter (revisited), HxH (revisited), Star Wars, Mass effect, LotR, PotC, Stargate

Nikola Tesla, the genius, a man who lost everything to balant capitalism and betrayal, awakens to find himself reborn as an orphan. What is this world? Why is he here? And will he once again fall for the capitalistic betrayal or pave his own way? What would happen if his genius adapts to cunningness of the society?