Harry Potter: A Certain Ancient Rune Professor of Hogwarts (TL) - Chapter 9

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 a game-like world where dungeons, monsters, and players appear.

There is a saying that goes, a rabbit does not eat the grass by its own burrow.Doctor Jiang said seriously: “Nonsense, this is clearly the case of the pavilion closest to the water enjoying the moonlight first.”He is the young and promising psychologist Jiang Baizhou, skilled in understanding people's hearts, cold and noble. After marrying his childhood sweetheart Nie Cenjin, he was only enthusiastic about showing off their love.For several consecutive days, Cen Jin received strong complaints from relatives and friends about his 'shameful' behavior and finally couldn't bear it anymore: “Can't we just be a bit more low-key?”Doctor Jiang lazily lifted his eyelids and said, “No way, if they don't like it, they'll just have to hold it in.”Later, the always gentle and lovely Cen Jin declared she wanted a divorce, Doctor Jiang narrowed his eyes slightly: “Divorce?”Nie Cenjin pouted seriously and earnestly: “Yes, divorce.”Sitting on the sofa, Doctor Jiang hesitated for a moment, the depths of his eyes revealing a hint of laughter as he slowly got up, walked over, wrapped his arms around her waist, and gently caressed her increasingly round belly with his other hand: “Be good, we don't dream during the day.”【A sweet romance with mutual covert love, 1V1, are you lacking sweetness today?】

Dark Sapphic Bully Romance- Glyndon Walton:The Waltons, my family, are on top of the world, and very conservative. I’m a good girl who goes to church every Sunday to confess my sins. I’m loyal to my boyfriend aka my future husband.+ Katherine Andrews:Since the rumor about me being a lesbian was spread around school, Glyndon and her group never stopped bullying me at school.I just had to bear the bullying a little longer, But I couldn’t… I needed to break her, to hurt her, to make her beg and cry, to destroy her, to make her desperate for me, to show her how much she wants and needs me… I needed her…______This book contains.+ Good Girl (Bully) X Disrepute biker Girl (The Victim??)+A hint of sport romance+Gay awakening+Biker Girl+ Crawling back to her+Height difference+Dark Romance+ Stalking