Reborn Before the Frozen Apocalypse, I Stock Resources Worth Billions - Chapter 11: Doomsday Descends

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.

Harem Dynast is the story of a princess set up in a political marriage with King Lorent, a great conqueror who is often mentioned in the Harem novels.

The new book is out! Meng Yunhan has been reincarnated back to the time of ‘food coupon era’, a time when people struggled with food and clothe shortages. But she is not afraid this time around. Equipped with a ‘cheat code’, she is ready not only to start her own business but also to grab a hold of her stoned-face brother and even support Baozi, her child.Stoned-face brother: “Wife, let’s pack up Baozi and leave!” He claims that having a son who is even clingier to his wife than himself is utterly shameless!“Mommy, let’s get a new daddy!” Baozi suggests. His daddy, a grown man, is still so clingy to mommy. How disgraceful!

A god of a different world had abruptly appeared in my classroom and semi-forcibly summoned the entire class to his world.ーーーーexcept for me, Kamiya Yato.