Isekai Maou to Shoukan Shoujo no Dorei Majutsu - Volume 10 Chapter 3 part7

Mimizuku, a small girl with chains on her wrists and ankles and the numbers “332” branded onto her forehead, wanders into the Forest of Night seeking to be eaten by a monster. However, when the ruler of the monsters, the mysterious and beautiful “King of Night,” refuses to eat her, she tries to formulate a way to convince him otherwise.

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.

He was an addict, a loser, a despicable human being.

recovery. However, I will try my best to work ahead and store drafts. If there are no surprises, the release will be around June 25th. Sending love, happy Dragon Boat Festival. Wishing you peace and joy. / 6.25: I still need to spend quite a long time accompanying her in the hospital. I'm willing but powerless, so the new book will be delayed. Dear readers, please don't wait.Transmigrated as cannon fodder, Tian Sangsang vows to turn her life around.Dark-skinned? I have white teeth.Fat? I can lose weight.Poor? I possess a space.So what if I'm ugly? My son is handsome!The handsome son's father: Ten miles of spring wind are not as good as you~(Note: Not traditional, the heroine has a 'golden thigh' but does not cultivate immortality. Also, the fourth volume actually starts from chapter 288 due to an error in volume arrangement, apologies. If you like this book, please vote for it, thank you!)